Finding the Fourth Proportional to 31,091.31, 42,904.83 and 16,943.85

Step by Step Solution

1. Step 1: Write the proportion equation
   31,091.31 : 42,904.83 = 16,943.85 : x
2. Step 2: Convert to fraction form
   31,091.31/42,904.83 = 16,943.85/x
3. Step 3: Cross multiply
   31,091.31x = 42,904.83 × 16,943.85
4. Step 4: Simplify right side
   31,091.31x = 726,973,003.80
5. Step 5: Solve for x
   x = 726,973,003.80/31,091.31
6. Step 6: Final answer
   x = 23,381.87