Finding the Fourth Proportional to 2,709.74, 4,064.52 and 860.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.74 : 4,064.52 = 860.96 : x
2. Step 2: Convert to fraction form
   2,709.74/4,064.52 = 860.96/x
3. Step 3: Cross multiply
   2,709.74x = 4,064.52 × 860.96
4. Step 4: Simplify right side
   2,709.74x = 3,499,389.14
5. Step 5: Solve for x
   x = 3,499,389.14/2,709.74
6. Step 6: Final answer
   x = 1,291.41