Finding the Fourth Proportional to 1,082.69, 1,619.58 and 808.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.69 : 1,619.58 = 808.10 : x
2. Step 2: Convert to fraction form
   1,082.69/1,619.58 = 808.10/x
3. Step 3: Cross multiply
   1,082.69x = 1,619.58 × 808.10
4. Step 4: Simplify right side
   1,082.69x = 1,308,782.60
5. Step 5: Solve for x
   x = 1,308,782.60/1,082.69
6. Step 6: Final answer
   x = 1,208.82