Finding the Fourth Proportional to 1,906.12, 2,630.46 and 1,078.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.12 : 2,630.46 = 1,078.12 : x
2. Step 2: Convert to fraction form
   1,906.12/2,630.46 = 1,078.12/x
3. Step 3: Cross multiply
   1,906.12x = 2,630.46 × 1,078.12
4. Step 4: Simplify right side
   1,906.12x = 2,835,951.54
5. Step 5: Solve for x
   x = 2,835,951.54/1,906.12
6. Step 6: Final answer
   x = 1,487.81