Finding the Fourth Proportional to 12,864.32, 17,755.72 and 7,560.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,864.32 : 17,755.72 = 7,560.88 : x
2. Step 2: Convert to fraction form
   12,864.32/17,755.72 = 7,560.88/x
3. Step 3: Cross multiply
   12,864.32x = 17,755.72 × 7,560.88
4. Step 4: Simplify right side
   12,864.32x = 134,248,868.23
5. Step 5: Solve for x
   x = 134,248,868.23/12,864.32
6. Step 6: Final answer
   x = 10,435.75