Finding the Fourth Proportional to 9,899.52, 13,661.56 and 5,650.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,899.52 : 13,661.56 = 5,650.50 : x
2. Step 2: Convert to fraction form
   9,899.52/13,661.56 = 5,650.50/x
3. Step 3: Cross multiply
   9,899.52x = 13,661.56 × 5,650.50
4. Step 4: Simplify right side
   9,899.52x = 77,194,644.78
5. Step 5: Solve for x
   x = 77,194,644.78/9,899.52
6. Step 6: Final answer
   x = 7,797.82