Finding the Fourth Proportional to 28,618.46, 39,501.71 and 17,286.15

Step by Step Solution

1. Step 1: Write the proportion equation
   28,618.46 : 39,501.71 = 17,286.15 : x
2. Step 2: Convert to fraction form
   28,618.46/39,501.71 = 17,286.15/x
3. Step 3: Cross multiply
   28,618.46x = 39,501.71 × 17,286.15
4. Step 4: Simplify right side
   28,618.46x = 682,832,397.89
5. Step 5: Solve for x
   x = 682,832,397.89/28,618.46
6. Step 6: Final answer
   x = 23,859.86