Finding the Fourth Proportional to 31,105.40, 42,925.34 and 16,958.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.40 : 42,925.34 = 16,958.24 : x
2. Step 2: Convert to fraction form
   31,105.40/42,925.34 = 16,958.24/x
3. Step 3: Cross multiply
   31,105.40x = 42,925.34 × 16,958.24
4. Step 4: Simplify right side
   31,105.40x = 727,938,217.80
5. Step 5: Solve for x
   x = 727,938,217.80/31,105.40
6. Step 6: Final answer
   x = 23,402.31