Finding the Fourth Proportional to 12,952.89, 17,874.96 and 7,647.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,952.89 : 17,874.96 = 7,647.78 : x
2. Step 2: Convert to fraction form
   12,952.89/17,874.96 = 7,647.78/x
3. Step 3: Cross multiply
   12,952.89x = 17,874.96 × 7,647.78
4. Step 4: Simplify right side
   12,952.89x = 136,703,761.59
5. Step 5: Solve for x
   x = 136,703,761.59/12,952.89
6. Step 6: Final answer
   x = 10,553.92