Finding the Fourth Proportional to 12,725.88, 17,561.72 and 7,757.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,725.88 : 17,561.72 = 7,757.88 : x
2. Step 2: Convert to fraction form
   12,725.88/17,561.72 = 7,757.88/x
3. Step 3: Cross multiply
   12,725.88x = 17,561.72 × 7,757.88
4. Step 4: Simplify right side
   12,725.88x = 136,241,716.35
5. Step 5: Solve for x
   x = 136,241,716.35/12,725.88
6. Step 6: Final answer
   x = 10,705.88