Finding the Fourth Proportional to 9,980.62, 13,772.98 and 5,504.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.62 : 13,772.98 = 5,504.29 : x
2. Step 2: Convert to fraction form
   9,980.62/13,772.98 = 5,504.29/x
3. Step 3: Cross multiply
   9,980.62x = 13,772.98 × 5,504.29
4. Step 4: Simplify right side
   9,980.62x = 75,810,427.89
5. Step 5: Solve for x
   x = 75,810,427.89/9,980.62
6. Step 6: Final answer
   x = 7,595.77