Finding the Fourth Proportional to 10,237.12, 14,128.72 and 5,761.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,237.12 : 14,128.72 = 5,761.20 : x
2. Step 2: Convert to fraction form
   10,237.12/14,128.72 = 5,761.20/x
3. Step 3: Cross multiply
   10,237.12x = 14,128.72 × 5,761.20
4. Step 4: Simplify right side
   10,237.12x = 81,398,381.66
5. Step 5: Solve for x
   x = 81,398,381.66/10,237.12
6. Step 6: Final answer
   x = 7,951.30