Finding the Fourth Proportional to 1,372.56, 2,067.72 and 1,304.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,372.56 : 2,067.72 = 1,304.64 : x
2. Step 2: Convert to fraction form
   1,372.56/2,067.72 = 1,304.64/x
3. Step 3: Cross multiply
   1,372.56x = 2,067.72 × 1,304.64
4. Step 4: Simplify right side
   1,372.56x = 2,697,630.22
5. Step 5: Solve for x
   x = 2,697,630.22/1,372.56
6. Step 6: Final answer
   x = 1,965.40