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Finding the Fourth Proportional to 978,415.80, 1,465,655.40 and 659,551.20

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Solution

The fourth proportional to 978,415.80, 1,465,655.40 and 659,551.20 is: 987,999.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,415.80 : 1,465,655.40 = 659,551.20 : x
  2. Step 2: Convert to fraction form
    978,415.80/1,465,655.40 = 659,551.20/x
  3. Step 3: Cross multiply
    978,415.80x = 1,465,655.40 × 659,551.20
  4. Step 4: Simplify right side
    978,415.80x = 966,674,777,856.48
  5. Step 5: Solve for x
    x = 966,674,777,856.48/978,415.80
  6. Step 6: Final answer
    x = 987,999.97

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