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Finding the Fourth Proportional to 7,759.66, 11,639.35 and 1,916.28

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Solution

The fourth proportional to 7,759.66, 11,639.35 and 1,916.28 is: 2,874.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,759.66 : 11,639.35 = 1,916.28 : x
  2. Step 2: Convert to fraction form
    7,759.66/11,639.35 = 1,916.28/x
  3. Step 3: Cross multiply
    7,759.66x = 11,639.35 × 1,916.28
  4. Step 4: Simplify right side
    7,759.66x = 22,304,253.62
  5. Step 5: Solve for x
    x = 22,304,253.62/7,759.66
  6. Step 6: Final answer
    x = 2,874.39

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