Finding the Fourth Proportional to 11,828.72, 17,706.18 and 8,712.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,828.72 : 17,706.18 = 8,712.25 : x
2. Step 2: Convert to fraction form
   11,828.72/17,706.18 = 8,712.25/x
3. Step 3: Cross multiply
   11,828.72x = 17,706.18 × 8,712.25
4. Step 4: Simplify right side
   11,828.72x = 154,260,534.61
5. Step 5: Solve for x
   x = 154,260,534.61/11,828.72
6. Step 6: Final answer
   x = 13,041.19