Finding the Fourth Proportional to 2,397.56, 3,597.98 and 858.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,397.56 : 3,597.98 = 858.56 : x
2. Step 2: Convert to fraction form
   2,397.56/3,597.98 = 858.56/x
3. Step 3: Cross multiply
   2,397.56x = 3,597.98 × 858.56
4. Step 4: Simplify right side
   2,397.56x = 3,089,086.41
5. Step 5: Solve for x
   x = 3,089,086.41/2,397.56
6. Step 6: Final answer
   x = 1,288.43