Finding the Fourth Proportional to 31,105.45, 42,925.39 and 16,958.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,105.45 : 42,925.39 = 16,958.31 : x
2. Step 2: Convert to fraction form
   31,105.45/42,925.39 = 16,958.31/x
3. Step 3: Cross multiply
   31,105.45x = 42,925.39 × 16,958.31
4. Step 4: Simplify right side
   31,105.45x = 727,942,070.49
5. Step 5: Solve for x
   x = 727,942,070.49/31,105.45
6. Step 6: Final answer
   x = 23,402.40