Finding the Fourth Proportional to 9,980.44, 13,772.63 and 5,504.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.44 : 13,772.63 = 5,504.15 : x
2. Step 2: Convert to fraction form
   9,980.44/13,772.63 = 5,504.15/x
3. Step 3: Cross multiply
   9,980.44x = 13,772.63 × 5,504.15
4. Step 4: Simplify right side
   9,980.44x = 75,806,669.61
5. Step 5: Solve for x
   x = 75,806,669.61/9,980.44
6. Step 6: Final answer
   x = 7,595.52