Finding the Fourth Proportional to 2,617,648.56, 3,926,358.60 and 820,491

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617,648.56 : 3,926,358.60 = 820,491 : x
2. Step 2: Convert to fraction form
   2,617,648.56/3,926,358.60 = 820,491/x
3. Step 3: Cross multiply
   2,617,648.56x = 3,926,358.60 × 820,491
4. Step 4: Simplify right side
   2,617,648.56x = 3,221,541,894,072.60
5. Step 5: Solve for x
   x = 3,221,541,894,072.60/2,617,648.56
6. Step 6: Final answer
   x = 1,230,700.69