Finding the Fourth Proportional to 1,686.64, 2,327.55 and 940.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.64 : 2,327.55 = 940.55 : x
2. Step 2: Convert to fraction form
   1,686.64/2,327.55 = 940.55/x
3. Step 3: Cross multiply
   1,686.64x = 2,327.55 × 940.55
4. Step 4: Simplify right side
   1,686.64x = 2,189,177.15
5. Step 5: Solve for x
   x = 2,189,177.15/1,686.64
6. Step 6: Final answer
   x = 1,297.95