Finding the Fourth Proportional to 2,660,042.68, 3,990,624.72 and 862,786.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660,042.68 : 3,990,624.72 = 862,786.33 : x
2. Step 2: Convert to fraction form
   2,660,042.68/3,990,624.72 = 862,786.33/x
3. Step 3: Cross multiply
   2,660,042.68x = 3,990,624.72 × 862,786.33
4. Step 4: Simplify right side
   2,660,042.68x = 3,443,056,456,576.08
5. Step 5: Solve for x
   x = 3,443,056,456,576.08/2,660,042.68
6. Step 6: Final answer
   x = 1,294,361.36