Finding the Fourth Proportional to 9,981.85, 13,775.58 and 5,505.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.85 : 13,775.58 = 5,505.61 : x
2. Step 2: Convert to fraction form
   9,981.85/13,775.58 = 5,505.61/x
3. Step 3: Cross multiply
   9,981.85x = 13,775.58 × 5,505.61
4. Step 4: Simplify right side
   9,981.85x = 75,842,936.56
5. Step 5: Solve for x
   x = 75,842,936.56/9,981.85
6. Step 6: Final answer
   x = 7,598.09