Finding the Fourth Proportional to 31,105.96, 42,926.16 and 16,958.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.96 : 42,926.16 = 16,958.77 : x
2. Step 2: Convert to fraction form
   31,105.96/42,926.16 = 16,958.77/x
3. Step 3: Cross multiply
   31,105.96x = 42,926.16 × 16,958.77
4. Step 4: Simplify right side
   31,105.96x = 727,974,874.42
5. Step 5: Solve for x
   x = 727,974,874.42/31,105.96
6. Step 6: Final answer
   x = 23,403.07