Finding the Fourth Proportional to 1,336.72, 1,996.20 and 1,322.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.72 : 1,996.20 = 1,322.24 : x
2. Step 2: Convert to fraction form
   1,336.72/1,996.20 = 1,322.24/x
3. Step 3: Cross multiply
   1,336.72x = 1,996.20 × 1,322.24
4. Step 4: Simplify right side
   1,336.72x = 2,639,455.49
5. Step 5: Solve for x
   x = 2,639,455.49/1,336.72
6. Step 6: Final answer
   x = 1,974.58