Finding the Fourth Proportional to 2,095.56, 3,138.32 and 1,216.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,095.56 : 3,138.32 = 1,216.20 : x
2. Step 2: Convert to fraction form
   2,095.56/3,138.32 = 1,216.20/x
3. Step 3: Cross multiply
   2,095.56x = 3,138.32 × 1,216.20
4. Step 4: Simplify right side
   2,095.56x = 3,816,824.78
5. Step 5: Solve for x
   x = 3,816,824.78/2,095.56
6. Step 6: Final answer
   x = 1,821.39