Finding the Fourth Proportional to 2,077.15, 3,114.90 and 690.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.15 : 3,114.90 = 690.10 : x
2. Step 2: Convert to fraction form
   2,077.15/3,114.90 = 690.10/x
3. Step 3: Cross multiply
   2,077.15x = 3,114.90 × 690.10
4. Step 4: Simplify right side
   2,077.15x = 2,149,592.49
5. Step 5: Solve for x
   x = 2,149,592.49/2,077.15
6. Step 6: Final answer
   x = 1,034.88