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Finding the Fourth Proportional to 391,531.20, 587,296.80 and 346,916.40

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Solution

The fourth proportional to 391,531.20, 587,296.80 and 346,916.40 is: 520,374.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,531.20 : 587,296.80 = 346,916.40 : x
  2. Step 2: Convert to fraction form
    391,531.20/587,296.80 = 346,916.40/x
  3. Step 3: Cross multiply
    391,531.20x = 587,296.80 × 346,916.40
  4. Step 4: Simplify right side
    391,531.20x = 203,742,891,587.52
  5. Step 5: Solve for x
    x = 203,742,891,587.52/391,531.20
  6. Step 6: Final answer
    x = 520,374.60

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