Finding the Fourth Proportional to 31,091.25, 42,905.94 and 16,944.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,091.25 : 42,905.94 = 16,944.09 : x
2. Step 2: Convert to fraction form
   31,091.25/42,905.94 = 16,944.09/x
3. Step 3: Cross multiply
   31,091.25x = 42,905.94 × 16,944.09
4. Step 4: Simplify right side
   31,091.25x = 727,002,108.89
5. Step 5: Solve for x
   x = 727,002,108.89/31,091.25
6. Step 6: Final answer
   x = 23,382.85