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Finding the Fourth Proportional to 217,580.80, 326,146.66 and 91,294.40

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Solution

The fourth proportional to 217,580.80, 326,146.66 and 91,294.40 is: 136,847.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,580.80 : 326,146.66 = 91,294.40 : x
  2. Step 2: Convert to fraction form
    217,580.80/326,146.66 = 91,294.40/x
  3. Step 3: Cross multiply
    217,580.80x = 326,146.66 × 91,294.40
  4. Step 4: Simplify right side
    217,580.80x = 29,775,363,636.70
  5. Step 5: Solve for x
    x = 29,775,363,636.70/217,580.80
  6. Step 6: Final answer
    x = 136,847.39

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