Finding the Fourth Proportional to 2,605,581.99, 3,908,185.25 and 808,419.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,605,581.99 : 3,908,185.25 = 808,419.20 : x
2. Step 2: Convert to fraction form
   2,605,581.99/3,908,185.25 = 808,419.20/x
3. Step 3: Cross multiply
   2,605,581.99x = 3,908,185.25 × 808,419.20
4. Step 4: Simplify right side
   2,605,581.99x = 3,159,451,969,673.78
5. Step 5: Solve for x
   x = 3,159,451,969,673.78/2,605,581.99
6. Step 6: Final answer
   x = 1,212,570.54