Finding the Fourth Proportional to 31,143.43, 42,958.71 and 22,193.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,143.43 : 42,958.71 = 22,193.80 : x
2. Step 2: Convert to fraction form
   31,143.43/42,958.71 = 22,193.80/x
3. Step 3: Cross multiply
   31,143.43x = 42,958.71 × 22,193.80
4. Step 4: Simplify right side
   31,143.43x = 953,417,018.00
5. Step 5: Solve for x
   x = 953,417,018.00/31,143.43
6. Step 6: Final answer
   x = 30,613.74