Finding the Fourth Proportional to 12,802.50, 17,672.31 and 8,613.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,802.50 : 17,672.31 = 8,613.18 : x
2. Step 2: Convert to fraction form
   12,802.50/17,672.31 = 8,613.18/x
3. Step 3: Cross multiply
   12,802.50x = 17,672.31 × 8,613.18
4. Step 4: Simplify right side
   12,802.50x = 152,214,787.05
5. Step 5: Solve for x
   x = 152,214,787.05/12,802.50
6. Step 6: Final answer
   x = 11,889.46