Finding the Fourth Proportional to 2,923.72, 4,390.62 and 2,146.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,923.72 : 4,390.62 = 2,146.12 : x
2. Step 2: Convert to fraction form
   2,923.72/4,390.62 = 2,146.12/x
3. Step 3: Cross multiply
   2,923.72x = 4,390.62 × 2,146.12
4. Step 4: Simplify right side
   2,923.72x = 9,422,797.39
5. Step 5: Solve for x
   x = 9,422,797.39/2,923.72
6. Step 6: Final answer
   x = 3,222.88