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Finding the Fourth Proportional to 3,930.48, 5,892.84 and 1,981.62

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Solution

The fourth proportional to 3,930.48, 5,892.84 and 1,981.62 is: 2,970.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,930.48 : 5,892.84 = 1,981.62 : x
  2. Step 2: Convert to fraction form
    3,930.48/5,892.84 = 1,981.62/x
  3. Step 3: Cross multiply
    3,930.48x = 5,892.84 × 1,981.62
  4. Step 4: Simplify right side
    3,930.48x = 11,677,369.60
  5. Step 5: Solve for x
    x = 11,677,369.60/3,930.48
  6. Step 6: Final answer
    x = 2,970.98

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