Finding the Fourth Proportional to 12,882.72, 17,786 and 12,088.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,882.72 : 17,786 = 12,088.48 : x
2. Step 2: Convert to fraction form
   12,882.72/17,786 = 12,088.48/x
3. Step 3: Cross multiply
   12,882.72x = 17,786 × 12,088.48
4. Step 4: Simplify right side
   12,882.72x = 215,005,705.28
5. Step 5: Solve for x
   x = 215,005,705.28/12,882.72
6. Step 6: Final answer
   x = 16,689.47