Finding the Fourth Proportional to 31,020.90, 42,808.83 and 16,873.74

Step by Step Solution

1. Step 1: Write the proportion equation
   31,020.90 : 42,808.83 = 16,873.74 : x
2. Step 2: Convert to fraction form
   31,020.90/42,808.83 = 16,873.74/x
3. Step 3: Cross multiply
   31,020.90x = 42,808.83 × 16,873.74
4. Step 4: Simplify right side
   31,020.90x = 722,345,067.12
5. Step 5: Solve for x
   x = 722,345,067.12/31,020.90
6. Step 6: Final answer
   x = 23,285.75