Finding the Fourth Proportional to 22,571.35, 31,148.55 and 12,499.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,571.35 : 31,148.55 = 12,499.57 : x
2. Step 2: Convert to fraction form
   22,571.35/31,148.55 = 12,499.57/x
3. Step 3: Cross multiply
   22,571.35x = 31,148.55 × 12,499.57
4. Step 4: Simplify right side
   22,571.35x = 389,343,520.06
5. Step 5: Solve for x
   x = 389,343,520.06/22,571.35
6. Step 6: Final answer
   x = 17,249.46