Finding the Fourth Proportional to 2,617,645.56, 3,926,354.10 and 820,488

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617,645.56 : 3,926,354.10 = 820,488 : x
2. Step 2: Convert to fraction form
   2,617,645.56/3,926,354.10 = 820,488/x
3. Step 3: Cross multiply
   2,617,645.56x = 3,926,354.10 × 820,488
4. Step 4: Simplify right side
   2,617,645.56x = 3,221,526,422,800.80
5. Step 5: Solve for x
   x = 3,221,526,422,800.80/2,617,645.56
6. Step 6: Final answer
   x = 1,230,696.19