Finding the Fourth Proportional to 2,076.42, 3,113.75 and 689.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.42 : 3,113.75 = 689.39 : x
2. Step 2: Convert to fraction form
   2,076.42/3,113.75 = 689.39/x
3. Step 3: Cross multiply
   2,076.42x = 3,113.75 × 689.39
4. Step 4: Simplify right side
   2,076.42x = 2,146,569.10
5. Step 5: Solve for x
   x = 2,146,569.10/2,076.42
6. Step 6: Final answer
   x = 1,033.78