Finding the Fourth Proportional to 2,077.35, 3,115.60 and 690.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.35 : 3,115.60 = 690.27 : x
2. Step 2: Convert to fraction form
   2,077.35/3,115.60 = 690.27/x
3. Step 3: Cross multiply
   2,077.35x = 3,115.60 × 690.27
4. Step 4: Simplify right side
   2,077.35x = 2,150,612.24
5. Step 5: Solve for x
   x = 2,150,612.24/2,077.35
6. Step 6: Final answer
   x = 1,035.27