Finding the Fourth Proportional to 9,981.16, 13,773.78 and 5,504.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,981.16 : 13,773.78 = 5,504.80 : x
2. Step 2: Convert to fraction form
   9,981.16/13,773.78 = 5,504.80/x
3. Step 3: Cross multiply
   9,981.16x = 13,773.78 × 5,504.80
4. Step 4: Simplify right side
   9,981.16x = 75,821,904.14
5. Step 5: Solve for x
   x = 75,821,904.14/9,981.16
6. Step 6: Final answer
   x = 7,596.50