Finding the Fourth Proportional to 1,229.00, 1,695.56 and 809.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.00 : 1,695.56 = 809.55 : x
2. Step 2: Convert to fraction form
   1,229.00/1,695.56 = 809.55/x
3. Step 3: Cross multiply
   1,229.00x = 1,695.56 × 809.55
4. Step 4: Simplify right side
   1,229.00x = 1,372,636.55
5. Step 5: Solve for x
   x = 1,372,636.55/1,229.00
6. Step 6: Final answer
   x = 1,116.88