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Finding the Fourth Proportional to 664,341.60, 996,512.40 and 428,145.60

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Solution

The fourth proportional to 664,341.60, 996,512.40 and 428,145.60 is: 642,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,341.60 : 996,512.40 = 428,145.60 : x
  2. Step 2: Convert to fraction form
    664,341.60/996,512.40 = 428,145.60/x
  3. Step 3: Cross multiply
    664,341.60x = 996,512.40 × 428,145.60
  4. Step 4: Simplify right side
    664,341.60x = 426,652,399,405.44
  5. Step 5: Solve for x
    x = 426,652,399,405.44/664,341.60
  6. Step 6: Final answer
    x = 642,218.40

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