Finding the Fourth Proportional to 2,912.09, 4,368.41 and 964.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,912.09 : 4,368.41 = 964.31 : x
2. Step 2: Convert to fraction form
   2,912.09/4,368.41 = 964.31/x
3. Step 3: Cross multiply
   2,912.09x = 4,368.41 × 964.31
4. Step 4: Simplify right side
   2,912.09x = 4,212,501.45
5. Step 5: Solve for x
   x = 4,212,501.45/2,912.09
6. Step 6: Final answer
   x = 1,446.56