Finding the Fourth Proportional to 2,068.50, 3,103.61 and 836.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.50 : 3,103.61 = 836.78 : x
2. Step 2: Convert to fraction form
   2,068.50/3,103.61 = 836.78/x
3. Step 3: Cross multiply
   2,068.50x = 3,103.61 × 836.78
4. Step 4: Simplify right side
   2,068.50x = 2,597,038.78
5. Step 5: Solve for x
   x = 2,597,038.78/2,068.50
6. Step 6: Final answer
   x = 1,255.52