Finding the Fourth Proportional to 2,311.89, 3,468.41 and 668.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,311.89 : 3,468.41 = 668.42 : x
2. Step 2: Convert to fraction form
   2,311.89/3,468.41 = 668.42/x
3. Step 3: Cross multiply
   2,311.89x = 3,468.41 × 668.42
4. Step 4: Simplify right side
   2,311.89x = 2,318,364.95
5. Step 5: Solve for x
   x = 2,318,364.95/2,311.89
6. Step 6: Final answer
   x = 1,002.80