Finding the Fourth Proportional to 1,435.56, 1,980.88 and 806.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.56 : 1,980.88 = 806.04 : x
2. Step 2: Convert to fraction form
   1,435.56/1,980.88 = 806.04/x
3. Step 3: Cross multiply
   1,435.56x = 1,980.88 × 806.04
4. Step 4: Simplify right side
   1,435.56x = 1,596,668.52
5. Step 5: Solve for x
   x = 1,596,668.52/1,435.56
6. Step 6: Final answer
   x = 1,112.23