Finding the Fourth Proportional to 1,906.40, 2,630.96 and 1,067.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.40 : 2,630.96 = 1,067.18 : x
2. Step 2: Convert to fraction form
   1,906.40/2,630.96 = 1,067.18/x
3. Step 3: Cross multiply
   1,906.40x = 2,630.96 × 1,067.18
4. Step 4: Simplify right side
   1,906.40x = 2,807,707.89
5. Step 5: Solve for x
   x = 2,807,707.89/1,906.40
6. Step 6: Final answer
   x = 1,472.78