Finding the Fourth Proportional to 31,015.41, 42,801.31 and 16,868.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,015.41 : 42,801.31 = 16,868.25 : x
2. Step 2: Convert to fraction form
   31,015.41/42,801.31 = 16,868.25/x
3. Step 3: Cross multiply
   31,015.41x = 42,801.31 × 16,868.25
4. Step 4: Simplify right side
   31,015.41x = 721,983,218.49
5. Step 5: Solve for x
   x = 721,983,218.49/31,015.41
6. Step 6: Final answer
   x = 23,278.21