Finding the Fourth Proportional to 2,301.36, 3,175.56 and 1,357.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,301.36 : 3,175.56 = 1,357.20 : x
2. Step 2: Convert to fraction form
   2,301.36/3,175.56 = 1,357.20/x
3. Step 3: Cross multiply
   2,301.36x = 3,175.56 × 1,357.20
4. Step 4: Simplify right side
   2,301.36x = 4,309,870.03
5. Step 5: Solve for x
   x = 4,309,870.03/2,301.36
6. Step 6: Final answer
   x = 1,872.75