Finding the Fourth Proportional to 2,057,185.42, 3,086,270.79 and 858,440.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057,185.42 : 3,086,270.79 = 858,440.90 : x
2. Step 2: Convert to fraction form
   2,057,185.42/3,086,270.79 = 858,440.90/x
3. Step 3: Cross multiply
   2,057,185.42x = 3,086,270.79 × 858,440.90
4. Step 4: Simplify right side
   2,057,185.42x = 2,649,381,074,611.31
5. Step 5: Solve for x
   x = 2,649,381,074,611.31/2,057,185.42
6. Step 6: Final answer
   x = 1,287,866.93