Finding the Fourth Proportional to 2,792.62, 4,187.90 and 1,211.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,792.62 : 4,187.90 = 1,211.18 : x
2. Step 2: Convert to fraction form
   2,792.62/4,187.90 = 1,211.18/x
3. Step 3: Cross multiply
   2,792.62x = 4,187.90 × 1,211.18
4. Step 4: Simplify right side
   2,792.62x = 5,072,300.72
5. Step 5: Solve for x
   x = 5,072,300.72/2,792.62
6. Step 6: Final answer
   x = 1,816.32