Finding the Fourth Proportional to 1,821.29, 2,728.82 and 1,206.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821.29 : 2,728.82 = 1,206.16 : x
2. Step 2: Convert to fraction form
   1,821.29/2,728.82 = 1,206.16/x
3. Step 3: Cross multiply
   1,821.29x = 2,728.82 × 1,206.16
4. Step 4: Simplify right side
   1,821.29x = 3,291,389.72
5. Step 5: Solve for x
   x = 3,291,389.72/1,821.29
6. Step 6: Final answer
   x = 1,807.18