Finding the Fourth Proportional to 31,119.52, 42,944.75 and 17,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,119.52 : 42,944.75 = 17,690.78 : x
2. Step 2: Convert to fraction form
   31,119.52/42,944.75 = 17,690.78/x
3. Step 3: Cross multiply
   31,119.52x = 42,944.75 × 17,690.78
4. Step 4: Simplify right side
   31,119.52x = 759,726,124.41
5. Step 5: Solve for x
   x = 759,726,124.41/31,119.52
6. Step 6: Final answer
   x = 24,413.17