Finding the Fourth Proportional to 31,081.51, 42,891.28 and 16,934.46

Step by Step Solution

1. Step 1: Write the proportion equation
   31,081.51 : 42,891.28 = 16,934.46 : x
2. Step 2: Convert to fraction form
   31,081.51/42,891.28 = 16,934.46/x
3. Step 3: Cross multiply
   31,081.51x = 42,891.28 × 16,934.46
4. Step 4: Simplify right side
   31,081.51x = 726,340,665.51
5. Step 5: Solve for x
   x = 726,340,665.51/31,081.51
6. Step 6: Final answer
   x = 23,368.90