Finding the Fourth Proportional to 1,686.16, 2,326.78 and 940.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.16 : 2,326.78 = 940.18 : x
2. Step 2: Convert to fraction form
   1,686.16/2,326.78 = 940.18/x
3. Step 3: Cross multiply
   1,686.16x = 2,326.78 × 940.18
4. Step 4: Simplify right side
   1,686.16x = 2,187,592.02
5. Step 5: Solve for x
   x = 2,187,592.02/1,686.16
6. Step 6: Final answer
   x = 1,297.38