Finding the Fourth Proportional to 2,123.78, 3,185 and 717.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.78 : 3,185 = 717.93 : x
2. Step 2: Convert to fraction form
   2,123.78/3,185 = 717.93/x
3. Step 3: Cross multiply
   2,123.78x = 3,185 × 717.93
4. Step 4: Simplify right side
   2,123.78x = 2,286,607.05
5. Step 5: Solve for x
   x = 2,286,607.05/2,123.78
6. Step 6: Final answer
   x = 1,076.67