Finding the Fourth Proportional to 31,036.79, 42,831.74 and 17,608.61

Step by Step Solution

1. Step 1: Write the proportion equation
   31,036.79 : 42,831.74 = 17,608.61 : x
2. Step 2: Convert to fraction form
   31,036.79/42,831.74 = 17,608.61/x
3. Step 3: Cross multiply
   31,036.79x = 42,831.74 × 17,608.61
4. Step 4: Simplify right side
   31,036.79x = 754,207,103.08
5. Step 5: Solve for x
   x = 754,207,103.08/31,036.79
6. Step 6: Final answer
   x = 24,300.43