Finding the Fourth Proportional to 2,788.94, 4,182.74 and 814.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788.94 : 4,182.74 = 814.05 : x
2. Step 2: Convert to fraction form
   2,788.94/4,182.74 = 814.05/x
3. Step 3: Cross multiply
   2,788.94x = 4,182.74 × 814.05
4. Step 4: Simplify right side
   2,788.94x = 3,404,955.43
5. Step 5: Solve for x
   x = 3,404,955.43/2,788.94
6. Step 6: Final answer
   x = 1,220.88