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Finding the Fourth Proportional to 3,942.80, 5,914.20 and 1,862.12

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Solution

The fourth proportional to 3,942.80, 5,914.20 and 1,862.12 is: 2,793.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.80 : 5,914.20 = 1,862.12 : x
  2. Step 2: Convert to fraction form
    3,942.80/5,914.20 = 1,862.12/x
  3. Step 3: Cross multiply
    3,942.80x = 5,914.20 × 1,862.12
  4. Step 4: Simplify right side
    3,942.80x = 11,012,950.10
  5. Step 5: Solve for x
    x = 11,012,950.10/3,942.80
  6. Step 6: Final answer
    x = 2,793.18

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