Finding the Fourth Proportional to 22,327.50, 30,811.95 and 12,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,327.50 : 30,811.95 = 12,391.50 : x
2. Step 2: Convert to fraction form
   22,327.50/30,811.95 = 12,391.50/x
3. Step 3: Cross multiply
   22,327.50x = 30,811.95 × 12,391.50
4. Step 4: Simplify right side
   22,327.50x = 381,806,278.43
5. Step 5: Solve for x
   x = 381,806,278.43/22,327.50
6. Step 6: Final answer
   x = 17,100.27