Finding the Fourth Proportional to 1,686.06, 2,326.83 and 940.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.06 : 2,326.83 = 940.05 : x
2. Step 2: Convert to fraction form
   1,686.06/2,326.83 = 940.05/x
3. Step 3: Cross multiply
   1,686.06x = 2,326.83 × 940.05
4. Step 4: Simplify right side
   1,686.06x = 2,187,336.54
5. Step 5: Solve for x
   x = 2,187,336.54/1,686.06
6. Step 6: Final answer
   x = 1,297.31