Finding the Fourth Proportional to 2,128.03, 3,185.97 and 1,642.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.03 : 3,185.97 = 1,642.03 : x
2. Step 2: Convert to fraction form
   2,128.03/3,185.97 = 1,642.03/x
3. Step 3: Cross multiply
   2,128.03x = 3,185.97 × 1,642.03
4. Step 4: Simplify right side
   2,128.03x = 5,231,458.32
5. Step 5: Solve for x
   x = 5,231,458.32/2,128.03
6. Step 6: Final answer
   x = 2,458.36