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Finding the Fourth Proportional to 3,136.98, 4,704.78 and 1,286.28

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Solution

The fourth proportional to 3,136.98, 4,704.78 and 1,286.28 is: 1,929.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,136.98 : 4,704.78 = 1,286.28 : x
  2. Step 2: Convert to fraction form
    3,136.98/4,704.78 = 1,286.28/x
  3. Step 3: Cross multiply
    3,136.98x = 4,704.78 × 1,286.28
  4. Step 4: Simplify right side
    3,136.98x = 6,051,664.42
  5. Step 5: Solve for x
    x = 6,051,664.42/3,136.98
  6. Step 6: Final answer
    x = 1,929.14

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