Finding the Fourth Proportional to 1,686.89, 2,327.91 and 940.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.89 : 2,327.91 = 940.89 : x
2. Step 2: Convert to fraction form
   1,686.89/2,327.91 = 940.89/x
3. Step 3: Cross multiply
   1,686.89x = 2,327.91 × 940.89
4. Step 4: Simplify right side
   1,686.89x = 2,190,315.13
5. Step 5: Solve for x
   x = 2,190,315.13/1,686.89
6. Step 6: Final answer
   x = 1,298.44