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Finding the Fourth Proportional to 1,866.78, 2,797.06 and 988.04

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Solution

The fourth proportional to 1,866.78, 2,797.06 and 988.04 is: 1,480.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,866.78 : 2,797.06 = 988.04 : x
  2. Step 2: Convert to fraction form
    1,866.78/2,797.06 = 988.04/x
  3. Step 3: Cross multiply
    1,866.78x = 2,797.06 × 988.04
  4. Step 4: Simplify right side
    1,866.78x = 2,763,607.16
  5. Step 5: Solve for x
    x = 2,763,607.16/1,866.78
  6. Step 6: Final answer
    x = 1,480.41

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