Finding the Fourth Proportional to 2,673.56, 4,012.01 and 1,287.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,673.56 : 4,012.01 = 1,287.05 : x
2. Step 2: Convert to fraction form
   2,673.56/4,012.01 = 1,287.05/x
3. Step 3: Cross multiply
   2,673.56x = 4,012.01 × 1,287.05
4. Step 4: Simplify right side
   2,673.56x = 5,163,643.04
5. Step 5: Solve for x
   x = 5,163,643.04/2,673.56
6. Step 6: Final answer
   x = 1,931.37