Finding the Fourth Proportional to 12,875.34, 17,761.20 and 9,726.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,875.34 : 17,761.20 = 9,726.06 : x
2. Step 2: Convert to fraction form
   12,875.34/17,761.20 = 9,726.06/x
3. Step 3: Cross multiply
   12,875.34x = 17,761.20 × 9,726.06
4. Step 4: Simplify right side
   12,875.34x = 172,746,496.87
5. Step 5: Solve for x
   x = 172,746,496.87/12,875.34
6. Step 6: Final answer
   x = 13,416.85