Finding the Fourth Proportional to 2,659,661.28, 3,990,052.44 and 862,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,659,661.28 : 3,990,052.44 = 862,404.72 : x
2. Step 2: Convert to fraction form
   2,659,661.28/3,990,052.44 = 862,404.72/x
3. Step 3: Cross multiply
   2,659,661.28x = 3,990,052.44 × 862,404.72
4. Step 4: Simplify right side
   2,659,661.28x = 3,441,040,057,303.52
5. Step 5: Solve for x
   x = 3,441,040,057,303.52/2,659,661.28
6. Step 6: Final answer
   x = 1,293,788.83