Finding the Fourth Proportional to 2,039.12, 2,816.52 and 2,008.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.12 : 2,816.52 = 2,008.40 : x
2. Step 2: Convert to fraction form
   2,039.12/2,816.52 = 2,008.40/x
3. Step 3: Cross multiply
   2,039.12x = 2,816.52 × 2,008.40
4. Step 4: Simplify right side
   2,039.12x = 5,656,698.77
5. Step 5: Solve for x
   x = 5,656,698.77/2,039.12
6. Step 6: Final answer
   x = 2,774.09