Finding the Fourth Proportional to 2,618,875.78, 3,928,479.69 and 821,830.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618,875.78 : 3,928,479.69 = 821,830.18 : x
2. Step 2: Convert to fraction form
   2,618,875.78/3,928,479.69 = 821,830.18/x
3. Step 3: Cross multiply
   2,618,875.78x = 3,928,479.69 × 821,830.18
4. Step 4: Simplify right side
   2,618,875.78x = 3,228,543,170,759.04
5. Step 5: Solve for x
   x = 3,228,543,170,759.04/2,618,875.78
6. Step 6: Final answer
   x = 1,232,797.37