Finding the Fourth Proportional to 11,086.78, 16,612.47 and 7,761.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,086.78 : 16,612.47 = 7,761.34 : x
2. Step 2: Convert to fraction form
   11,086.78/16,612.47 = 7,761.34/x
3. Step 3: Cross multiply
   11,086.78x = 16,612.47 × 7,761.34
4. Step 4: Simplify right side
   11,086.78x = 128,935,027.91
5. Step 5: Solve for x
   x = 128,935,027.91/11,086.78
6. Step 6: Final answer
   x = 11,629.62