Finding the Fourth Proportional to 9,085.31, 12,560.09 and 9,002.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,085.31 : 12,560.09 = 9,002.15 : x
2. Step 2: Convert to fraction form
   9,085.31/12,560.09 = 9,002.15/x
3. Step 3: Cross multiply
   9,085.31x = 12,560.09 × 9,002.15
4. Step 4: Simplify right side
   9,085.31x = 113,067,706.38
5. Step 5: Solve for x
   x = 113,067,706.38/9,085.31
6. Step 6: Final answer
   x = 12,445.12