Finding the Fourth Proportional to 1,906.50, 2,630.91 and 1,067.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.50 : 2,630.91 = 1,067.28 : x
2. Step 2: Convert to fraction form
   1,906.50/2,630.91 = 1,067.28/x
3. Step 3: Cross multiply
   1,906.50x = 2,630.91 × 1,067.28
4. Step 4: Simplify right side
   1,906.50x = 2,807,917.62
5. Step 5: Solve for x
   x = 2,807,917.62/1,906.50
6. Step 6: Final answer
   x = 1,472.81