Finding the Fourth Proportional to 31,059.94, 42,862.88 and 16,912.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,059.94 : 42,862.88 = 16,912.79 : x
2. Step 2: Convert to fraction form
   31,059.94/42,862.88 = 16,912.79/x
3. Step 3: Cross multiply
   31,059.94x = 42,862.88 × 16,912.79
4. Step 4: Simplify right side
   31,059.94x = 724,930,716.20
5. Step 5: Solve for x
   x = 724,930,716.20/31,059.94
6. Step 6: Final answer
   x = 23,339.74