Finding the Fourth Proportional to 2,077.39, 3,115.01 and 690.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.39 : 3,115.01 = 690.23 : x
2. Step 2: Convert to fraction form
   2,077.39/3,115.01 = 690.23/x
3. Step 3: Cross multiply
   2,077.39x = 3,115.01 × 690.23
4. Step 4: Simplify right side
   2,077.39x = 2,150,082.87
5. Step 5: Solve for x
   x = 2,150,082.87/2,077.39
6. Step 6: Final answer
   x = 1,034.99