Finding the Fourth Proportional to 2,128.73, 3,186.91 and 1,304.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.73 : 3,186.91 = 1,304.51 : x
2. Step 2: Convert to fraction form
   2,128.73/3,186.91 = 1,304.51/x
3. Step 3: Cross multiply
   2,128.73x = 3,186.91 × 1,304.51
4. Step 4: Simplify right side
   2,128.73x = 4,157,355.96
5. Step 5: Solve for x
   x = 4,157,355.96/2,128.73
6. Step 6: Final answer
   x = 1,952.97