Finding the Fourth Proportional to 2,115,930.81, 3,172,895.83 and 819,690.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115,930.81 : 3,172,895.83 = 819,690.34 : x
2. Step 2: Convert to fraction form
   2,115,930.81/3,172,895.83 = 819,690.34/x
3. Step 3: Cross multiply
   2,115,930.81x = 3,172,895.83 × 819,690.34
4. Step 4: Simplify right side
   2,115,930.81x = 2,600,792,057,578.83
5. Step 5: Solve for x
   x = 2,600,792,057,578.83/2,115,930.81
6. Step 6: Final answer
   x = 1,229,147.97