Finding the Fourth Proportional to 13,271.25, 19,915.99 and 5,480.13

Step by Step Solution

1. Step 1: Write the proportion equation
   13,271.25 : 19,915.99 = 5,480.13 : x
2. Step 2: Convert to fraction form
   13,271.25/19,915.99 = 5,480.13/x
3. Step 3: Cross multiply
   13,271.25x = 19,915.99 × 5,480.13
4. Step 4: Simplify right side
   13,271.25x = 109,142,200.58
5. Step 5: Solve for x
   x = 109,142,200.58/13,271.25
6. Step 6: Final answer
   x = 8,223.96