Finding the Fourth Proportional to 31,057.76, 42,859.67 and 16,910.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,057.76 : 42,859.67 = 16,910.60 : x
2. Step 2: Convert to fraction form
   31,057.76/42,859.67 = 16,910.60/x
3. Step 3: Cross multiply
   31,057.76x = 42,859.67 × 16,910.60
4. Step 4: Simplify right side
   31,057.76x = 724,782,436.65
5. Step 5: Solve for x
   x = 724,782,436.65/31,057.76
6. Step 6: Final answer
   x = 23,336.60