Finding the Fourth Proportional to 12,517.16, 17,279.27 and 7,985.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,517.16 : 17,279.27 = 7,985.89 : x
2. Step 2: Convert to fraction form
   12,517.16/17,279.27 = 7,985.89/x
3. Step 3: Cross multiply
   12,517.16x = 17,279.27 × 7,985.89
4. Step 4: Simplify right side
   12,517.16x = 137,990,406.04
5. Step 5: Solve for x
   x = 137,990,406.04/12,517.16
6. Step 6: Final answer
   x = 11,024.10