Finding the Fourth Proportional to 12,760.86, 17,611.18 and 7,726.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,760.86 : 17,611.18 = 7,726.30 : x
2. Step 2: Convert to fraction form
   12,760.86/17,611.18 = 7,726.30/x
3. Step 3: Cross multiply
   12,760.86x = 17,611.18 × 7,726.30
4. Step 4: Simplify right side
   12,760.86x = 136,069,260.03
5. Step 5: Solve for x
   x = 136,069,260.03/12,760.86
6. Step 6: Final answer
   x = 10,663.02