Finding the Fourth Proportional to 22,581.99, 31,149.77 and 13,624.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,581.99 : 31,149.77 = 13,624.20 : x
2. Step 2: Convert to fraction form
   22,581.99/31,149.77 = 13,624.20/x
3. Step 3: Cross multiply
   22,581.99x = 31,149.77 × 13,624.20
4. Step 4: Simplify right side
   22,581.99x = 424,390,628.31
5. Step 5: Solve for x
   x = 424,390,628.31/22,581.99
6. Step 6: Final answer
   x = 18,793.32