Finding the Fourth Proportional to 2,076.97, 3,115.59 and 690.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.97 : 3,115.59 = 690.40 : x
2. Step 2: Convert to fraction form
   2,076.97/3,115.59 = 690.40/x
3. Step 3: Cross multiply
   2,076.97x = 3,115.59 × 690.40
4. Step 4: Simplify right side
   2,076.97x = 2,151,003.34
5. Step 5: Solve for x
   x = 2,151,003.34/2,076.97
6. Step 6: Final answer
   x = 1,035.64