Finding the Fourth Proportional to 2,155.62, 2,974.50 and 1,211.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.62 : 2,974.50 = 1,211.46 : x
2. Step 2: Convert to fraction form
   2,155.62/2,974.50 = 1,211.46/x
3. Step 3: Cross multiply
   2,155.62x = 2,974.50 × 1,211.46
4. Step 4: Simplify right side
   2,155.62x = 3,603,487.77
5. Step 5: Solve for x
   x = 3,603,487.77/2,155.62
6. Step 6: Final answer
   x = 1,671.67