Finding the Fourth Proportional to 9,085.30, 12,502.29 and 8,039.86

Step by Step Solution

1. Step 1: Write the proportion equation
   9,085.30 : 12,502.29 = 8,039.86 : x
2. Step 2: Convert to fraction form
   9,085.30/12,502.29 = 8,039.86/x
3. Step 3: Cross multiply
   9,085.30x = 12,502.29 × 8,039.86
4. Step 4: Simplify right side
   9,085.30x = 100,516,661.28
5. Step 5: Solve for x
   x = 100,516,661.28/9,085.30
6. Step 6: Final answer
   x = 11,063.66