Finding the Fourth Proportional to 2,128.36, 3,197.40 and 1,513.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.36 : 3,197.40 = 1,513.57 : x
2. Step 2: Convert to fraction form
   2,128.36/3,197.40 = 1,513.57/x
3. Step 3: Cross multiply
   2,128.36x = 3,197.40 × 1,513.57
4. Step 4: Simplify right side
   2,128.36x = 4,839,488.72
5. Step 5: Solve for x
   x = 4,839,488.72/2,128.36
6. Step 6: Final answer
   x = 2,273.81