Finding the Fourth Proportional to 22,638.79, 31,245.27 and 12,570.46

Step by Step Solution

1. Step 1: Write the proportion equation
   22,638.79 : 31,245.27 = 12,570.46 : x
2. Step 2: Convert to fraction form
   22,638.79/31,245.27 = 12,570.46/x
3. Step 3: Cross multiply
   22,638.79x = 31,245.27 × 12,570.46
4. Step 4: Simplify right side
   22,638.79x = 392,767,416.72
5. Step 5: Solve for x
   x = 392,767,416.72/22,638.79
6. Step 6: Final answer
   x = 17,349.31