Finding the Fourth Proportional to 9,171.12, 13,761.56 and 5,480.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,171.12 : 13,761.56 = 5,480.56 : x
2. Step 2: Convert to fraction form
   9,171.12/13,761.56 = 5,480.56/x
3. Step 3: Cross multiply
   9,171.12x = 13,761.56 × 5,480.56
4. Step 4: Simplify right side
   9,171.12x = 75,421,055.27
5. Step 5: Solve for x
   x = 75,421,055.27/9,171.12
6. Step 6: Final answer
   x = 8,223.76