Finding the Fourth Proportional to 10,725.12, 16,026.42 and 8,039.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,725.12 : 16,026.42 = 8,039.16 : x
2. Step 2: Convert to fraction form
   10,725.12/16,026.42 = 8,039.16/x
3. Step 3: Cross multiply
   10,725.12x = 16,026.42 × 8,039.16
4. Step 4: Simplify right side
   10,725.12x = 128,838,954.61
5. Step 5: Solve for x
   x = 128,838,954.61/10,725.12
6. Step 6: Final answer
   x = 12,012.82