Finding the Fourth Proportional to 2,065.94, 3,100.20 and 1,287.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,065.94 : 3,100.20 = 1,287.47 : x
2. Step 2: Convert to fraction form
   2,065.94/3,100.20 = 1,287.47/x
3. Step 3: Cross multiply
   2,065.94x = 3,100.20 × 1,287.47
4. Step 4: Simplify right side
   2,065.94x = 3,991,414.49
5. Step 5: Solve for x
   x = 3,991,414.49/2,065.94
6. Step 6: Final answer
   x = 1,932.01