Finding the Fourth Proportional to 22,485.78, 31,025.55 and 13,049.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,485.78 : 31,025.55 = 13,049.28 : x
2. Step 2: Convert to fraction form
   22,485.78/31,025.55 = 13,049.28/x
3. Step 3: Cross multiply
   22,485.78x = 31,025.55 × 13,049.28
4. Step 4: Simplify right side
   22,485.78x = 404,861,089.10
5. Step 5: Solve for x
   x = 404,861,089.10/22,485.78
6. Step 6: Final answer
   x = 18,005.21