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Finding the Fourth Proportional to 3,991.09, 5,986.64 and 1,394.03

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Solution

The fourth proportional to 3,991.09, 5,986.64 and 1,394.03 is: 2,091.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.09 : 5,986.64 = 1,394.03 : x
  2. Step 2: Convert to fraction form
    3,991.09/5,986.64 = 1,394.03/x
  3. Step 3: Cross multiply
    3,991.09x = 5,986.64 × 1,394.03
  4. Step 4: Simplify right side
    3,991.09x = 8,345,529.31
  5. Step 5: Solve for x
    x = 8,345,529.31/3,991.09
  6. Step 6: Final answer
    x = 2,091.04

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