Finding the Fourth Proportional to 2,128.38, 3,186.37 and 1,304.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.38 : 3,186.37 = 1,304.13 : x
2. Step 2: Convert to fraction form
   2,128.38/3,186.37 = 1,304.13/x
3. Step 3: Cross multiply
   2,128.38x = 3,186.37 × 1,304.13
4. Step 4: Simplify right side
   2,128.38x = 4,155,440.71
5. Step 5: Solve for x
   x = 4,155,440.71/2,128.38
6. Step 6: Final answer
   x = 1,952.40