Finding the Fourth Proportional to 2,811.30, 4,216.56 and 962.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.30 : 4,216.56 = 962.39 : x
2. Step 2: Convert to fraction form
   2,811.30/4,216.56 = 962.39/x
3. Step 3: Cross multiply
   2,811.30x = 4,216.56 × 962.39
4. Step 4: Simplify right side
   2,811.30x = 4,057,954.10
5. Step 5: Solve for x
   x = 4,057,954.10/2,811.30
6. Step 6: Final answer
   x = 1,443.44