Finding the Fourth Proportional to 2,086.38, 3,128.04 and 1,264.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.38 : 3,128.04 = 1,264.68 : x
2. Step 2: Convert to fraction form
   2,086.38/3,128.04 = 1,264.68/x
3. Step 3: Cross multiply
   2,086.38x = 3,128.04 × 1,264.68
4. Step 4: Simplify right side
   2,086.38x = 3,955,969.63
5. Step 5: Solve for x
   x = 3,955,969.63/2,086.38
6. Step 6: Final answer
   x = 1,896.09