Finding the Fourth Proportional to 31,058.96, 42,861.04 and 16,911.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,058.96 : 42,861.04 = 16,911.80 : x
2. Step 2: Convert to fraction form
   31,058.96/42,861.04 = 16,911.80/x
3. Step 3: Cross multiply
   31,058.96x = 42,861.04 × 16,911.80
4. Step 4: Simplify right side
   31,058.96x = 724,857,336.27
5. Step 5: Solve for x
   x = 724,857,336.27/31,058.96
6. Step 6: Final answer
   x = 23,338.11