Finding the Fourth Proportional to 12,726.56, 17,562.60 and 7,758.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,726.56 : 17,562.60 = 7,758.56 : x
2. Step 2: Convert to fraction form
   12,726.56/17,562.60 = 7,758.56/x
3. Step 3: Cross multiply
   12,726.56x = 17,562.60 × 7,758.56
4. Step 4: Simplify right side
   12,726.56x = 136,260,485.86
5. Step 5: Solve for x
   x = 136,260,485.86/12,726.56
6. Step 6: Final answer
   x = 10,706.78