Finding the Fourth Proportional to 12,549.57, 17,308.83 and 9,191.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,549.57 : 17,308.83 = 9,191.17 : x
2. Step 2: Convert to fraction form
   12,549.57/17,308.83 = 9,191.17/x
3. Step 3: Cross multiply
   12,549.57x = 17,308.83 × 9,191.17
4. Step 4: Simplify right side
   12,549.57x = 159,088,399.03
5. Step 5: Solve for x
   x = 159,088,399.03/12,549.57
6. Step 6: Final answer
   x = 12,676.80