Finding the Fourth Proportional to 2,086.38, 3,128.04 and 1,264.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.38 : 3,128.04 = 1,264.46 : x
2. Step 2: Convert to fraction form
   2,086.38/3,128.04 = 1,264.46/x
3. Step 3: Cross multiply
   2,086.38x = 3,128.04 × 1,264.46
4. Step 4: Simplify right side
   2,086.38x = 3,955,265.82
5. Step 5: Solve for x
   x = 3,955,265.82/2,086.38
6. Step 6: Final answer
   x = 1,895.76