Finding the Fourth Proportional to 2,068.57, 3,105.07 and 836.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.57 : 3,105.07 = 836.79 : x
2. Step 2: Convert to fraction form
   2,068.57/3,105.07 = 836.79/x
3. Step 3: Cross multiply
   2,068.57x = 3,105.07 × 836.79
4. Step 4: Simplify right side
   2,068.57x = 2,598,277.79
5. Step 5: Solve for x
   x = 2,598,277.79/2,068.57
6. Step 6: Final answer
   x = 1,256.07