Finding the Fourth Proportional to 2,069.76, 3,105.22 and 836.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.76 : 3,105.22 = 836.88 : x
2. Step 2: Convert to fraction form
   2,069.76/3,105.22 = 836.88/x
3. Step 3: Cross multiply
   2,069.76x = 3,105.22 × 836.88
4. Step 4: Simplify right side
   2,069.76x = 2,598,696.51
5. Step 5: Solve for x
   x = 2,598,696.51/2,069.76
6. Step 6: Final answer
   x = 1,255.55