Finding the Fourth Proportional to 2,707.74, 4,061.52 and 858.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,707.74 : 4,061.52 = 858.96 : x
2. Step 2: Convert to fraction form
   2,707.74/4,061.52 = 858.96/x
3. Step 3: Cross multiply
   2,707.74x = 4,061.52 × 858.96
4. Step 4: Simplify right side
   2,707.74x = 3,488,683.22
5. Step 5: Solve for x
   x = 3,488,683.22/2,707.74
6. Step 6: Final answer
   x = 1,288.41