Finding the Fourth Proportional to 22,550.72, 31,116.96 and 13,112

Step by Step Solution

1. Step 1: Write the proportion equation
   22,550.72 : 31,116.96 = 13,112 : x
2. Step 2: Convert to fraction form
   22,550.72/31,116.96 = 13,112/x
3. Step 3: Cross multiply
   22,550.72x = 31,116.96 × 13,112
4. Step 4: Simplify right side
   22,550.72x = 408,005,579.52
5. Step 5: Solve for x
   x = 408,005,579.52/22,550.72
6. Step 6: Final answer
   x = 18,092.80