Finding the Fourth Proportional to 2,333.78, 3,500.12 and 689.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,333.78 : 3,500.12 = 689.88 : x
2. Step 2: Convert to fraction form
   2,333.78/3,500.12 = 689.88/x
3. Step 3: Cross multiply
   2,333.78x = 3,500.12 × 689.88
4. Step 4: Simplify right side
   2,333.78x = 2,414,662.79
5. Step 5: Solve for x
   x = 2,414,662.79/2,333.78
6. Step 6: Final answer
   x = 1,034.66