Finding the Fourth Proportional to 9,980.72, 13,773.50 and 5,504.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.72 : 13,773.50 = 5,504.64 : x
2. Step 2: Convert to fraction form
   9,980.72/13,773.50 = 5,504.64/x
3. Step 3: Cross multiply
   9,980.72x = 13,773.50 × 5,504.64
4. Step 4: Simplify right side
   9,980.72x = 75,818,159.04
5. Step 5: Solve for x
   x = 75,818,159.04/9,980.72
6. Step 6: Final answer
   x = 7,596.46