Finding the Fourth Proportional to 2,570.94, 3,854.62 and 815.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.94 : 3,854.62 = 815.37 : x
2. Step 2: Convert to fraction form
   2,570.94/3,854.62 = 815.37/x
3. Step 3: Cross multiply
   2,570.94x = 3,854.62 × 815.37
4. Step 4: Simplify right side
   2,570.94x = 3,142,928.07
5. Step 5: Solve for x
   x = 3,142,928.07/2,570.94
6. Step 6: Final answer
   x = 1,222.48