Finding the Fourth Proportional to 31,057.34, 42,859.90 and 16,910.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,057.34 : 42,859.90 = 16,910.96 : x
2. Step 2: Convert to fraction form
   31,057.34/42,859.90 = 16,910.96/x
3. Step 3: Cross multiply
   31,057.34x = 42,859.90 × 16,910.96
4. Step 4: Simplify right side
   31,057.34x = 724,802,054.50
5. Step 5: Solve for x
   x = 724,802,054.50/31,057.34
6. Step 6: Final answer
   x = 23,337.54