Finding the Fourth Proportional to 9,900.80, 14,856.67 and 5,520.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.80 : 14,856.67 = 5,520.73 : x
2. Step 2: Convert to fraction form
   9,900.80/14,856.67 = 5,520.73/x
3. Step 3: Cross multiply
   9,900.80x = 14,856.67 × 5,520.73
4. Step 4: Simplify right side
   9,900.80x = 82,019,663.77
5. Step 5: Solve for x
   x = 82,019,663.77/9,900.80
6. Step 6: Final answer
   x = 8,284.15