Finding the Fourth Proportional to 2,074.24, 3,111.84 and 1,209.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,074.24 : 3,111.84 = 1,209.28 : x
2. Step 2: Convert to fraction form
   2,074.24/3,111.84 = 1,209.28/x
3. Step 3: Cross multiply
   2,074.24x = 3,111.84 × 1,209.28
4. Step 4: Simplify right side
   2,074.24x = 3,763,085.88
5. Step 5: Solve for x
   x = 3,763,085.88/2,074.24
6. Step 6: Final answer
   x = 1,814.20