Finding the Fourth Proportional to 2,155.83, 2,974.97 and 1,211.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.83 : 2,974.97 = 1,211.59 : x
2. Step 2: Convert to fraction form
   2,155.83/2,974.97 = 1,211.59/x
3. Step 3: Cross multiply
   2,155.83x = 2,974.97 × 1,211.59
4. Step 4: Simplify right side
   2,155.83x = 3,604,450.65
5. Step 5: Solve for x
   x = 3,604,450.65/2,155.83
6. Step 6: Final answer
   x = 1,671.96