Finding the Fourth Proportional to 31,128.39, 42,958.26 and 16,982.01

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.39 : 42,958.26 = 16,982.01 : x
2. Step 2: Convert to fraction form
   31,128.39/42,958.26 = 16,982.01/x
3. Step 3: Cross multiply
   31,128.39x = 42,958.26 × 16,982.01
4. Step 4: Simplify right side
   31,128.39x = 729,517,600.90
5. Step 5: Solve for x
   x = 729,517,600.90/31,128.39
6. Step 6: Final answer
   x = 23,435.76