Finding the Fourth Proportional to 31,087.46, 42,900.62 and 16,940.28

Step by Step Solution

1. Step 1: Write the proportion equation
   31,087.46 : 42,900.62 = 16,940.28 : x
2. Step 2: Convert to fraction form
   31,087.46/42,900.62 = 16,940.28/x
3. Step 3: Cross multiply
   31,087.46x = 42,900.62 × 16,940.28
4. Step 4: Simplify right side
   31,087.46x = 726,748,514.97
5. Step 5: Solve for x
   x = 726,748,514.97/31,087.46
6. Step 6: Final answer
   x = 23,377.55