Finding the Fourth Proportional to 2,321.72, 3,482.04 and 860.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,321.72 : 3,482.04 = 860.84 : x
2. Step 2: Convert to fraction form
   2,321.72/3,482.04 = 860.84/x
3. Step 3: Cross multiply
   2,321.72x = 3,482.04 × 860.84
4. Step 4: Simplify right side
   2,321.72x = 2,997,479.31
5. Step 5: Solve for x
   x = 2,997,479.31/2,321.72
6. Step 6: Final answer
   x = 1,291.06