Finding the Fourth Proportional to 31,105.89, 42,926.36 and 16,958.43

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.89 : 42,926.36 = 16,958.43 : x
2. Step 2: Convert to fraction form
   31,105.89/42,926.36 = 16,958.43/x
3. Step 3: Cross multiply
   31,105.89x = 42,926.36 × 16,958.43
4. Step 4: Simplify right side
   31,105.89x = 727,963,586.42
5. Step 5: Solve for x
   x = 727,963,586.42/31,105.89
6. Step 6: Final answer
   x = 23,402.76