Finding the Fourth Proportional to 1,381.72, 1,906.62 and 940.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,381.72 : 1,906.62 = 940.18 : x
2. Step 2: Convert to fraction form
   1,381.72/1,906.62 = 940.18/x
3. Step 3: Cross multiply
   1,381.72x = 1,906.62 × 940.18
4. Step 4: Simplify right side
   1,381.72x = 1,792,565.99
5. Step 5: Solve for x
   x = 1,792,565.99/1,381.72
6. Step 6: Final answer
   x = 1,297.34