Finding the Fourth Proportional to 21,641.16, 32,480.16 and 8,502.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,641.16 : 32,480.16 = 8,502.72 : x
2. Step 2: Convert to fraction form
   21,641.16/32,480.16 = 8,502.72/x
3. Step 3: Cross multiply
   21,641.16x = 32,480.16 × 8,502.72
4. Step 4: Simplify right side
   21,641.16x = 276,169,706.04
5. Step 5: Solve for x
   x = 276,169,706.04/21,641.16
6. Step 6: Final answer
   x = 12,761.32