Finding the Fourth Proportional to 22,556.72, 31,125.24 and 13,118

Step by Step Solution

1. Step 1: Write the proportion equation
   22,556.72 : 31,125.24 = 13,118 : x
2. Step 2: Convert to fraction form
   22,556.72/31,125.24 = 13,118/x
3. Step 3: Cross multiply
   22,556.72x = 31,125.24 × 13,118
4. Step 4: Simplify right side
   22,556.72x = 408,300,898.32
5. Step 5: Solve for x
   x = 408,300,898.32/22,556.72
6. Step 6: Final answer
   x = 18,101.08