Finding the Fourth Proportional to 10,887.72, 15,020.46 and 7,255.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,887.72 : 15,020.46 = 7,255.35 : x
2. Step 2: Convert to fraction form
   10,887.72/15,020.46 = 7,255.35/x
3. Step 3: Cross multiply
   10,887.72x = 15,020.46 × 7,255.35
4. Step 4: Simplify right side
   10,887.72x = 108,978,694.46
5. Step 5: Solve for x
   x = 108,978,694.46/10,887.72
6. Step 6: Final answer
   x = 10,009.32