Finding the Fourth Proportional to 22,743.56, 31,389 and 13,311.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,743.56 : 31,389 = 13,311.92 : x
2. Step 2: Convert to fraction form
   22,743.56/31,389 = 13,311.92/x
3. Step 3: Cross multiply
   22,743.56x = 31,389 × 13,311.92
4. Step 4: Simplify right side
   22,743.56x = 417,847,856.88
5. Step 5: Solve for x
   x = 417,847,856.88/22,743.56
6. Step 6: Final answer
   x = 18,372.14