Finding the Fourth Proportional to 31,118.32, 42,945.86 and 17,693.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,118.32 : 42,945.86 = 17,693.80 : x
2. Step 2: Convert to fraction form
   31,118.32/42,945.86 = 17,693.80/x
3. Step 3: Cross multiply
   31,118.32x = 42,945.86 × 17,693.80
4. Step 4: Simplify right side
   31,118.32x = 759,875,457.67
5. Step 5: Solve for x
   x = 759,875,457.67/31,118.32
6. Step 6: Final answer
   x = 24,418.91