Finding the Fourth Proportional to 1,906.67, 2,630.86 and 1,067.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,906.67 : 2,630.86 = 1,067.21 : x
2. Step 2: Convert to fraction form
   1,906.67/2,630.86 = 1,067.21/x
3. Step 3: Cross multiply
   1,906.67x = 2,630.86 × 1,067.21
4. Step 4: Simplify right side
   1,906.67x = 2,807,680.10
5. Step 5: Solve for x
   x = 2,807,680.10/1,906.67
6. Step 6: Final answer
   x = 1,472.56