Finding the Fourth Proportional to 9,980.80, 13,773.60 and 5,504.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.80 : 13,773.60 = 5,504.74 : x
2. Step 2: Convert to fraction form
   9,980.80/13,773.60 = 5,504.74/x
3. Step 3: Cross multiply
   9,980.80x = 13,773.60 × 5,504.74
4. Step 4: Simplify right side
   9,980.80x = 75,820,086.86
5. Step 5: Solve for x
   x = 75,820,086.86/9,980.80
6. Step 6: Final answer
   x = 7,596.59