Finding the Fourth Proportional to 31,117.22, 42,940.05 and 17,686.61

Step by Step Solution

1. Step 1: Write the proportion equation
   31,117.22 : 42,940.05 = 17,686.61 : x
2. Step 2: Convert to fraction form
   31,117.22/42,940.05 = 17,686.61/x
3. Step 3: Cross multiply
   31,117.22x = 42,940.05 × 17,686.61
4. Step 4: Simplify right side
   31,117.22x = 759,463,703.03
5. Step 5: Solve for x
   x = 759,463,703.03/31,117.22
6. Step 6: Final answer
   x = 24,406.54