Finding the Fourth Proportional to 9,981.88, 13,775.05 and 5,505.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.88 : 13,775.05 = 5,505.75 : x
2. Step 2: Convert to fraction form
   9,981.88/13,775.05 = 5,505.75/x
3. Step 3: Cross multiply
   9,981.88x = 13,775.05 × 5,505.75
4. Step 4: Simplify right side
   9,981.88x = 75,841,912.66
5. Step 5: Solve for x
   x = 75,841,912.66/9,981.88
6. Step 6: Final answer
   x = 7,597.96