Finding the Fourth Proportional to 31,093.20, 42,906.24 and 16,945.74

Step by Step Solution

1. Step 1: Write the proportion equation
   31,093.20 : 42,906.24 = 16,945.74 : x
2. Step 2: Convert to fraction form
   31,093.20/42,906.24 = 16,945.74/x
3. Step 3: Cross multiply
   31,093.20x = 42,906.24 × 16,945.74
4. Step 4: Simplify right side
   31,093.20x = 727,077,987.42
5. Step 5: Solve for x
   x = 727,077,987.42/31,093.20
6. Step 6: Final answer
   x = 23,383.83