Finding the Fourth Proportional to 9,672.72, 13,347.90 and 5,480.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,672.72 : 13,347.90 = 5,480.16 : x
2. Step 2: Convert to fraction form
   9,672.72/13,347.90 = 5,480.16/x
3. Step 3: Cross multiply
   9,672.72x = 13,347.90 × 5,480.16
4. Step 4: Simplify right side
   9,672.72x = 73,148,627.66
5. Step 5: Solve for x
   x = 73,148,627.66/9,672.72
6. Step 6: Final answer
   x = 7,562.36