Finding the Fourth Proportional to 22,520.89, 31,077.48 and 12,448.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.89 : 31,077.48 = 12,448.72 : x
2. Step 2: Convert to fraction form
   22,520.89/31,077.48 = 12,448.72/x
3. Step 3: Cross multiply
   22,520.89x = 31,077.48 × 12,448.72
4. Step 4: Simplify right side
   22,520.89x = 386,874,932.36
5. Step 5: Solve for x
   x = 386,874,932.36/22,520.89
6. Step 6: Final answer
   x = 17,178.49