Finding the Fourth Proportional to 9,980.95, 13,773.54 and 5,505.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.95 : 13,773.54 = 5,505.13 : x
2. Step 2: Convert to fraction form
   9,980.95/13,773.54 = 5,505.13/x
3. Step 3: Cross multiply
   9,980.95x = 13,773.54 × 5,505.13
4. Step 4: Simplify right side
   9,980.95x = 75,825,128.26
5. Step 5: Solve for x
   x = 75,825,128.26/9,980.95
6. Step 6: Final answer
   x = 7,596.99