Finding the Fourth Proportional to 31,028.28, 42,817.98 and 16,880.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,028.28 : 42,817.98 = 16,880.76 : x
2. Step 2: Convert to fraction form
   31,028.28/42,817.98 = 16,880.76/x
3. Step 3: Cross multiply
   31,028.28x = 42,817.98 × 16,880.76
4. Step 4: Simplify right side
   31,028.28x = 722,800,044.06
5. Step 5: Solve for x
   x = 722,800,044.06/31,028.28
6. Step 6: Final answer
   x = 23,294.88