Finding the Fourth Proportional to 2,628.28, 3,939.01 and 1,066.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.28 : 3,939.01 = 1,066.46 : x
2. Step 2: Convert to fraction form
   2,628.28/3,939.01 = 1,066.46/x
3. Step 3: Cross multiply
   2,628.28x = 3,939.01 × 1,066.46
4. Step 4: Simplify right side
   2,628.28x = 4,200,791.27
5. Step 5: Solve for x
   x = 4,200,791.27/2,628.28
6. Step 6: Final answer
   x = 1,598.31