Finding the Fourth Proportional to 9,900.72, 14,851.56 and 5,514.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.72 : 14,851.56 = 5,514.90 : x
2. Step 2: Convert to fraction form
   9,900.72/14,851.56 = 5,514.90/x
3. Step 3: Cross multiply
   9,900.72x = 14,851.56 × 5,514.90
4. Step 4: Simplify right side
   9,900.72x = 81,904,868.24
5. Step 5: Solve for x
   x = 81,904,868.24/9,900.72
6. Step 6: Final answer
   x = 8,272.62