Finding the Fourth Proportional to 7,761.92, 10,714.55 and 7,648.01

Step by Step Solution

1. Step 1: Write the proportion equation
   7,761.92 : 10,714.55 = 7,648.01 : x
2. Step 2: Convert to fraction form
   7,761.92/10,714.55 = 7,648.01/x
3. Step 3: Cross multiply
   7,761.92x = 10,714.55 × 7,648.01
4. Step 4: Simplify right side
   7,761.92x = 81,945,031.45
5. Step 5: Solve for x
   x = 81,945,031.45/7,761.92
6. Step 6: Final answer
   x = 10,557.32