Finding the Fourth Proportional to 1,636.53, 2,258.32 and 964.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.53 : 2,258.32 = 964.31 : x
2. Step 2: Convert to fraction form
   1,636.53/2,258.32 = 964.31/x
3. Step 3: Cross multiply
   1,636.53x = 2,258.32 × 964.31
4. Step 4: Simplify right side
   1,636.53x = 2,177,709.27
5. Step 5: Solve for x
   x = 2,177,709.27/1,636.53
6. Step 6: Final answer
   x = 1,330.69