Finding the Fourth Proportional to 2,321.28, 3,483.72 and 860.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,321.28 : 3,483.72 = 860.76 : x
2. Step 2: Convert to fraction form
   2,321.28/3,483.72 = 860.76/x
3. Step 3: Cross multiply
   2,321.28x = 3,483.72 × 860.76
4. Step 4: Simplify right side
   2,321.28x = 2,998,646.83
5. Step 5: Solve for x
   x = 2,998,646.83/2,321.28
6. Step 6: Final answer
   x = 1,291.81