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Finding the Fourth Proportional to 1,786.80, 2,679.84 and 1,136.64

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Solution

The fourth proportional to 1,786.80, 2,679.84 and 1,136.64 is: 1,704.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.80 : 2,679.84 = 1,136.64 : x
  2. Step 2: Convert to fraction form
    1,786.80/2,679.84 = 1,136.64/x
  3. Step 3: Cross multiply
    1,786.80x = 2,679.84 × 1,136.64
  4. Step 4: Simplify right side
    1,786.80x = 3,046,013.34
  5. Step 5: Solve for x
    x = 3,046,013.34/1,786.80
  6. Step 6: Final answer
    x = 1,704.73

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