Finding the Fourth Proportional to 9,980.31, 13,773.17 and 5,504.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.31 : 13,773.17 = 5,504.20 : x
2. Step 2: Convert to fraction form
   9,980.31/13,773.17 = 5,504.20/x
3. Step 3: Cross multiply
   9,980.31x = 13,773.17 × 5,504.20
4. Step 4: Simplify right side
   9,980.31x = 75,810,282.31
5. Step 5: Solve for x
   x = 75,810,282.31/9,980.31
6. Step 6: Final answer
   x = 7,595.98