Finding the Fourth Proportional to 1,017.87, 1,516.59 and 908.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.87 : 1,516.59 = 908.73 : x
2. Step 2: Convert to fraction form
   1,017.87/1,516.59 = 908.73/x
3. Step 3: Cross multiply
   1,017.87x = 1,516.59 × 908.73
4. Step 4: Simplify right side
   1,017.87x = 1,378,170.83
5. Step 5: Solve for x
   x = 1,378,170.83/1,017.87
6. Step 6: Final answer
   x = 1,353.98