Finding the Fourth Proportional to 22,527.24, 31,087.72 and 12,318.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,527.24 : 31,087.72 = 12,318.30 : x
2. Step 2: Convert to fraction form
   22,527.24/31,087.72 = 12,318.30/x
3. Step 3: Cross multiply
   22,527.24x = 31,087.72 × 12,318.30
4. Step 4: Simplify right side
   22,527.24x = 382,947,861.28
5. Step 5: Solve for x
   x = 382,947,861.28/22,527.24
6. Step 6: Final answer
   x = 16,999.32