Finding the Fourth Proportional to 22,362.25, 30,859.92 and 12,931.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,362.25 : 30,859.92 = 12,931.42 : x
2. Step 2: Convert to fraction form
   22,362.25/30,859.92 = 12,931.42/x
3. Step 3: Cross multiply
   22,362.25x = 30,859.92 × 12,931.42
4. Step 4: Simplify right side
   22,362.25x = 399,062,586.69
5. Step 5: Solve for x
   x = 399,062,586.69/22,362.25
6. Step 6: Final answer
   x = 17,845.37