Finding the Fourth Proportional to 2,155.62, 2,974.78 and 1,684.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.62 : 2,974.78 = 1,684.06 : x
2. Step 2: Convert to fraction form
   2,155.62/2,974.78 = 1,684.06/x
3. Step 3: Cross multiply
   2,155.62x = 2,974.78 × 1,684.06
4. Step 4: Simplify right side
   2,155.62x = 5,009,708.01
5. Step 5: Solve for x
   x = 5,009,708.01/2,155.62
6. Step 6: Final answer
   x = 2,324.02