Finding the Fourth Proportional to 2,777,790.80, 4,167,085.42 and 858,851.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,777,790.80 : 4,167,085.42 = 858,851.59 : x
2. Step 2: Convert to fraction form
   2,777,790.80/4,167,085.42 = 858,851.59/x
3. Step 3: Cross multiply
   2,777,790.80x = 4,167,085.42 × 858,851.59
4. Step 4: Simplify right side
   2,777,790.80x = 3,578,907,938,632.82
5. Step 5: Solve for x
   x = 3,578,907,938,632.82/2,777,790.80
6. Step 6: Final answer
   x = 1,288,400.82