Finding the Fourth Proportional to 2,097.12, 3,144.72 and 1,253.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.12 : 3,144.72 = 1,253.21 : x
2. Step 2: Convert to fraction form
   2,097.12/3,144.72 = 1,253.21/x
3. Step 3: Cross multiply
   2,097.12x = 3,144.72 × 1,253.21
4. Step 4: Simplify right side
   2,097.12x = 3,940,994.55
5. Step 5: Solve for x
   x = 3,940,994.55/2,097.12
6. Step 6: Final answer
   x = 1,879.24