Finding the Fourth Proportional to 12,761.68, 17,611.49 and 7,726.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,761.68 : 17,611.49 = 7,726.82 : x
2. Step 2: Convert to fraction form
   12,761.68/17,611.49 = 7,726.82/x
3. Step 3: Cross multiply
   12,761.68x = 17,611.49 × 7,726.82
4. Step 4: Simplify right side
   12,761.68x = 136,080,725.10
5. Step 5: Solve for x
   x = 136,080,725.10/12,761.68
6. Step 6: Final answer
   x = 10,663.23