Finding the Fourth Proportional to 1,074.15, 1,483.98 and 918.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.15 : 1,483.98 = 918.39 : x
2. Step 2: Convert to fraction form
   1,074.15/1,483.98 = 918.39/x
3. Step 3: Cross multiply
   1,074.15x = 1,483.98 × 918.39
4. Step 4: Simplify right side
   1,074.15x = 1,362,872.39
5. Step 5: Solve for x
   x = 1,362,872.39/1,074.15
6. Step 6: Final answer
   x = 1,268.79