Finding the Fourth Proportional to 31,058.87, 42,861.24 and 16,911.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,058.87 : 42,861.24 = 16,911.72 : x
2. Step 2: Convert to fraction form
   31,058.87/42,861.24 = 16,911.72/x
3. Step 3: Cross multiply
   31,058.87x = 42,861.24 × 16,911.72
4. Step 4: Simplify right side
   31,058.87x = 724,857,289.73
5. Step 5: Solve for x
   x = 724,857,289.73/31,058.87
6. Step 6: Final answer
   x = 23,338.18