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Finding the Fourth Proportional to 978,486.40, 1,467,729.60 and 659,621.80

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Solution

The fourth proportional to 978,486.40, 1,467,729.60 and 659,621.80 is: 989,432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,486.40 : 1,467,729.60 = 659,621.80 : x
  2. Step 2: Convert to fraction form
    978,486.40/1,467,729.60 = 659,621.80/x
  3. Step 3: Cross multiply
    978,486.40x = 1,467,729.60 × 659,621.80
  4. Step 4: Simplify right side
    978,486.40x = 968,146,440,665.28
  5. Step 5: Solve for x
    x = 968,146,440,665.28/978,486.40
  6. Step 6: Final answer
    x = 989,432.70

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