Finding the Fourth Proportional to 1,382.46, 1,906.34 and 1,067.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.46 : 1,906.34 = 1,067.78 : x
2. Step 2: Convert to fraction form
   1,382.46/1,906.34 = 1,067.78/x
3. Step 3: Cross multiply
   1,382.46x = 1,906.34 × 1,067.78
4. Step 4: Simplify right side
   1,382.46x = 2,035,541.62
5. Step 5: Solve for x
   x = 2,035,541.62/1,382.46
6. Step 6: Final answer
   x = 1,472.40