Finding the Fourth Proportional to 2,661,611.74, 3,993,561.33 and 865,045.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661,611.74 : 3,993,561.33 = 865,045.78 : x
2. Step 2: Convert to fraction form
   2,661,611.74/3,993,561.33 = 865,045.78/x
3. Step 3: Cross multiply
   2,661,611.74x = 3,993,561.33 × 865,045.78
4. Step 4: Simplify right side
   2,661,611.74x = 3,454,613,375,687.69
5. Step 5: Solve for x
   x = 3,454,613,375,687.69/2,661,611.74
6. Step 6: Final answer
   x = 1,297,940.39