Finding the Fourth Proportional to 1,015.50, 1,399.50 and 937.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.50 : 1,399.50 = 937.08 : x
2. Step 2: Convert to fraction form
   1,015.50/1,399.50 = 937.08/x
3. Step 3: Cross multiply
   1,015.50x = 1,399.50 × 937.08
4. Step 4: Simplify right side
   1,015.50x = 1,311,443.46
5. Step 5: Solve for x
   x = 1,311,443.46/1,015.50
6. Step 6: Final answer
   x = 1,291.43