Finding the Fourth Proportional to 2,069.77, 3,105.33 and 836.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.77 : 3,105.33 = 836.55 : x
2. Step 2: Convert to fraction form
   2,069.77/3,105.33 = 836.55/x
3. Step 3: Cross multiply
   2,069.77x = 3,105.33 × 836.55
4. Step 4: Simplify right side
   2,069.77x = 2,597,763.81
5. Step 5: Solve for x
   x = 2,597,763.81/2,069.77
6. Step 6: Final answer
   x = 1,255.10