Finding the Fourth Proportional to 31,026.48, 42,815.31 and 16,879.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,026.48 : 42,815.31 = 16,879.32 : x
2. Step 2: Convert to fraction form
   31,026.48/42,815.31 = 16,879.32/x
3. Step 3: Cross multiply
   31,026.48x = 42,815.31 × 16,879.32
4. Step 4: Simplify right side
   31,026.48x = 722,693,318.39
5. Step 5: Solve for x
   x = 722,693,318.39/31,026.48
6. Step 6: Final answer
   x = 23,292.79