Finding the Fourth Proportional to 1,003.68, 1,501.50 and 868.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.68 : 1,501.50 = 868.18 : x
2. Step 2: Convert to fraction form
   1,003.68/1,501.50 = 868.18/x
3. Step 3: Cross multiply
   1,003.68x = 1,501.50 × 868.18
4. Step 4: Simplify right side
   1,003.68x = 1,303,572.27
5. Step 5: Solve for x
   x = 1,303,572.27/1,003.68
6. Step 6: Final answer
   x = 1,298.79