Finding the Fourth Proportional to 14,271.96, 21,405.72 and 5,505.60

Step by Step Solution

1. Step 1: Write the proportion equation
   14,271.96 : 21,405.72 = 5,505.60 : x
2. Step 2: Convert to fraction form
   14,271.96/21,405.72 = 5,505.60/x
3. Step 3: Cross multiply
   14,271.96x = 21,405.72 × 5,505.60
4. Step 4: Simplify right side
   14,271.96x = 117,851,332.03
5. Step 5: Solve for x
   x = 117,851,332.03/14,271.96
6. Step 6: Final answer
   x = 8,257.54