Finding the Fourth Proportional to 31,021, 42,808.42 and 16,873.64

Step by Step Solution

1. Step 1: Write the proportion equation
   31,021 : 42,808.42 = 16,873.64 : x
2. Step 2: Convert to fraction form
   31,021/42,808.42 = 16,873.64/x
3. Step 3: Cross multiply
   31,021x = 42,808.42 × 16,873.64
4. Step 4: Simplify right side
   31,021x = 722,333,868.05
5. Step 5: Solve for x
   x = 722,333,868.05/31,021
6. Step 6: Final answer
   x = 23,285.32