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Finding the Fourth Proportional to 391,491.80, 587,237.70 and 142,141.40

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Solution

The fourth proportional to 391,491.80, 587,237.70 and 142,141.40 is: 213,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,491.80 : 587,237.70 = 142,141.40 : x
  2. Step 2: Convert to fraction form
    391,491.80/587,237.70 = 142,141.40/x
  3. Step 3: Cross multiply
    391,491.80x = 587,237.70 × 142,141.40
  4. Step 4: Simplify right side
    391,491.80x = 83,470,788,810.78
  5. Step 5: Solve for x
    x = 83,470,788,810.78/391,491.80
  6. Step 6: Final answer
    x = 213,212.10

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