Finding the Fourth Proportional to 2,906.68, 4,359.57 and 826.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,906.68 : 4,359.57 = 826.78 : x
2. Step 2: Convert to fraction form
   2,906.68/4,359.57 = 826.78/x
3. Step 3: Cross multiply
   2,906.68x = 4,359.57 × 826.78
4. Step 4: Simplify right side
   2,906.68x = 3,604,405.28
5. Step 5: Solve for x
   x = 3,604,405.28/2,906.68
6. Step 6: Final answer
   x = 1,240.04