Finding the Fourth Proportional to 2,039.40, 2,815.04 and 1,200.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.40 : 2,815.04 = 1,200.06 : x
2. Step 2: Convert to fraction form
   2,039.40/2,815.04 = 1,200.06/x
3. Step 3: Cross multiply
   2,039.40x = 2,815.04 × 1,200.06
4. Step 4: Simplify right side
   2,039.40x = 3,378,216.90
5. Step 5: Solve for x
   x = 3,378,216.90/2,039.40
6. Step 6: Final answer
   x = 1,656.48