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Finding the Fourth Proportional to 2,939.67, 4,408.68 and 859.77

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Solution

The fourth proportional to 2,939.67, 4,408.68 and 859.77 is: 1,289.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.67 : 4,408.68 = 859.77 : x
  2. Step 2: Convert to fraction form
    2,939.67/4,408.68 = 859.77/x
  3. Step 3: Cross multiply
    2,939.67x = 4,408.68 × 859.77
  4. Step 4: Simplify right side
    2,939.67x = 3,790,450.80
  5. Step 5: Solve for x
    x = 3,790,450.80/2,939.67
  6. Step 6: Final answer
    x = 1,289.41

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