Finding the Fourth Proportional to 2,155.72, 2,974.90 and 1,409.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.72 : 2,974.90 = 1,409.22 : x
2. Step 2: Convert to fraction form
   2,155.72/2,974.90 = 1,409.22/x
3. Step 3: Cross multiply
   2,155.72x = 2,974.90 × 1,409.22
4. Step 4: Simplify right side
   2,155.72x = 4,192,288.58
5. Step 5: Solve for x
   x = 4,192,288.58/2,155.72
6. Step 6: Final answer
   x = 1,944.73