Finding the Fourth Proportional to 31,057.27, 42,858.60 and 16,910.11

Step by Step Solution

1. Step 1: Write the proportion equation
   31,057.27 : 42,858.60 = 16,910.11 : x
2. Step 2: Convert to fraction form
   31,057.27/42,858.60 = 16,910.11/x
3. Step 3: Cross multiply
   31,057.27x = 42,858.60 × 16,910.11
4. Step 4: Simplify right side
   31,057.27x = 724,743,640.45
5. Step 5: Solve for x
   x = 724,743,640.45/31,057.27
6. Step 6: Final answer
   x = 23,335.72