Finding the Fourth Proportional to 2,945.33, 4,064.78 and 1,686.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,945.33 : 4,064.78 = 1,686.78 : x
2. Step 2: Convert to fraction form
   2,945.33/4,064.78 = 1,686.78/x
3. Step 3: Cross multiply
   2,945.33x = 4,064.78 × 1,686.78
4. Step 4: Simplify right side
   2,945.33x = 6,856,389.61
5. Step 5: Solve for x
   x = 6,856,389.61/2,945.33
6. Step 6: Final answer
   x = 2,327.89