Finding the Fourth Proportional to 22,541.76, 31,111.34 and 13,115.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,541.76 : 31,111.34 = 13,115.79 : x
2. Step 2: Convert to fraction form
   22,541.76/31,111.34 = 13,115.79/x
3. Step 3: Cross multiply
   22,541.76x = 31,111.34 × 13,115.79
4. Step 4: Simplify right side
   22,541.76x = 408,049,736.48
5. Step 5: Solve for x
   x = 408,049,736.48/22,541.76
6. Step 6: Final answer
   x = 18,101.95