Finding the Fourth Proportional to 31,019.73, 42,806.91 and 16,872.57

Step by Step Solution

1. Step 1: Write the proportion equation
   31,019.73 : 42,806.91 = 16,872.57 : x
2. Step 2: Convert to fraction form
   31,019.73/42,806.91 = 16,872.57/x
3. Step 3: Cross multiply
   31,019.73x = 42,806.91 × 16,872.57
4. Step 4: Simplify right side
   31,019.73x = 722,262,585.46
5. Step 5: Solve for x
   x = 722,262,585.46/31,019.73
6. Step 6: Final answer
   x = 23,283.97