Finding the Fourth Proportional to 9,981.80, 13,774.98 and 5,505.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.80 : 13,774.98 = 5,505.74 : x
2. Step 2: Convert to fraction form
   9,981.80/13,774.98 = 5,505.74/x
3. Step 3: Cross multiply
   9,981.80x = 13,774.98 × 5,505.74
4. Step 4: Simplify right side
   9,981.80x = 75,841,458.39
5. Step 5: Solve for x
   x = 75,841,458.39/9,981.80
6. Step 6: Final answer
   x = 7,597.97