Finding the Fourth Proportional to 2,057,185.41, 3,086,270.79 and 858,440.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057,185.41 : 3,086,270.79 = 858,440.89 : x
2. Step 2: Convert to fraction form
   2,057,185.41/3,086,270.79 = 858,440.89/x
3. Step 3: Cross multiply
   2,057,185.41x = 3,086,270.79 × 858,440.89
4. Step 4: Simplify right side
   2,057,185.41x = 2,649,381,043,748.60
5. Step 5: Solve for x
   x = 2,649,381,043,748.60/2,057,185.41
6. Step 6: Final answer
   x = 1,287,866.92