Finding the Fourth Proportional to 31,016.28, 42,801.54 and 16,868.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,016.28 : 42,801.54 = 16,868.76 : x
2. Step 2: Convert to fraction form
   31,016.28/42,801.54 = 16,868.76/x
3. Step 3: Cross multiply
   31,016.28x = 42,801.54 × 16,868.76
4. Step 4: Simplify right side
   31,016.28x = 722,008,905.89
5. Step 5: Solve for x
   x = 722,008,905.89/31,016.28
6. Step 6: Final answer
   x = 23,278.38