Finding the Fourth Proportional to 31,003.98, 42,783.57 and 17,391.27

Step by Step Solution

1. Step 1: Write the proportion equation
   31,003.98 : 42,783.57 = 17,391.27 : x
2. Step 2: Convert to fraction form
   31,003.98/42,783.57 = 17,391.27/x
3. Step 3: Cross multiply
   31,003.98x = 42,783.57 × 17,391.27
4. Step 4: Simplify right side
   31,003.98x = 744,060,617.43
5. Step 5: Solve for x
   x = 744,060,617.43/31,003.98
6. Step 6: Final answer
   x = 23,998.87