Finding the Fourth Proportional to 10,881.54, 16,285.86 and 7,761.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,881.54 : 16,285.86 = 7,761.42 : x
2. Step 2: Convert to fraction form
   10,881.54/16,285.86 = 7,761.42/x
3. Step 3: Cross multiply
   10,881.54x = 16,285.86 × 7,761.42
4. Step 4: Simplify right side
   10,881.54x = 126,401,399.52
5. Step 5: Solve for x
   x = 126,401,399.52/10,881.54
6. Step 6: Final answer
   x = 11,616.13