Finding the Fourth Proportional to 2,707.32, 4,061.12 and 858.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,707.32 : 4,061.12 = 858.58 : x
2. Step 2: Convert to fraction form
   2,707.32/4,061.12 = 858.58/x
3. Step 3: Cross multiply
   2,707.32x = 4,061.12 × 858.58
4. Step 4: Simplify right side
   2,707.32x = 3,486,794.32
5. Step 5: Solve for x
   x = 3,486,794.32/2,707.32
6. Step 6: Final answer
   x = 1,287.91