Finding the Fourth Proportional to 31,111.38, 42,932.77 and 16,964.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,111.38 : 42,932.77 = 16,964.50 : x
2. Step 2: Convert to fraction form
   31,111.38/42,932.77 = 16,964.50/x
3. Step 3: Cross multiply
   31,111.38x = 42,932.77 × 16,964.50
4. Step 4: Simplify right side
   31,111.38x = 728,332,976.67
5. Step 5: Solve for x
   x = 728,332,976.67/31,111.38
6. Step 6: Final answer
   x = 23,410.50