Finding the Fourth Proportional to 1,918.42, 2,647.35 and 1,079.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,918.42 : 2,647.35 = 1,079.15 : x
2. Step 2: Convert to fraction form
   1,918.42/2,647.35 = 1,079.15/x
3. Step 3: Cross multiply
   1,918.42x = 2,647.35 × 1,079.15
4. Step 4: Simplify right side
   1,918.42x = 2,856,874.52
5. Step 5: Solve for x
   x = 2,856,874.52/1,918.42
6. Step 6: Final answer
   x = 1,489.18