Finding the Fourth Proportional to 31,057.57, 42,859.55 and 16,910.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,057.57 : 42,859.55 = 16,910.50 : x
2. Step 2: Convert to fraction form
   31,057.57/42,859.55 = 16,910.50/x
3. Step 3: Cross multiply
   31,057.57x = 42,859.55 × 16,910.50
4. Step 4: Simplify right side
   31,057.57x = 724,776,420.28
5. Step 5: Solve for x
   x = 724,776,420.28/31,057.57
6. Step 6: Final answer
   x = 23,336.55