Finding the Fourth Proportional to 22,783.72, 31,441.48 and 12,711.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,783.72 : 31,441.48 = 12,711.57 : x
2. Step 2: Convert to fraction form
   22,783.72/31,441.48 = 12,711.57/x
3. Step 3: Cross multiply
   22,783.72x = 31,441.48 × 12,711.57
4. Step 4: Simplify right side
   22,783.72x = 399,670,573.92
5. Step 5: Solve for x
   x = 399,670,573.92/22,783.72
6. Step 6: Final answer
   x = 17,541.94