Finding the Fourth Proportional to 2,164.79, 3,249.23 and 1,340.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.79 : 3,249.23 = 1,340.57 : x
2. Step 2: Convert to fraction form
   2,164.79/3,249.23 = 1,340.57/x
3. Step 3: Cross multiply
   2,164.79x = 3,249.23 × 1,340.57
4. Step 4: Simplify right side
   2,164.79x = 4,355,797.31
5. Step 5: Solve for x
   x = 4,355,797.31/2,164.79
6. Step 6: Final answer
   x = 2,012.12