Finding the Fourth Proportional to 31,081.80, 42,891.73 and 16,934.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.80 : 42,891.73 = 16,934.34 : x
2. Step 2: Convert to fraction form
   31,081.80/42,891.73 = 16,934.34/x
3. Step 3: Cross multiply
   31,081.80x = 42,891.73 × 16,934.34
4. Step 4: Simplify right side
   31,081.80x = 726,343,139.01
5. Step 5: Solve for x
   x = 726,343,139.01/31,081.80
6. Step 6: Final answer
   x = 23,368.76