Finding the Fourth Proportional to 9,980.79, 13,773.95 and 5,504.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.79 : 13,773.95 = 5,504.59 : x
2. Step 2: Convert to fraction form
   9,980.79/13,773.95 = 5,504.59/x
3. Step 3: Cross multiply
   9,980.79x = 13,773.95 × 5,504.59
4. Step 4: Simplify right side
   9,980.79x = 75,819,947.43
5. Step 5: Solve for x
   x = 75,819,947.43/9,980.79
6. Step 6: Final answer
   x = 7,596.59