Finding the Fourth Proportional to 1,435.07, 1,980.41 and 805.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.07 : 1,980.41 = 805.73 : x
2. Step 2: Convert to fraction form
   1,435.07/1,980.41 = 805.73/x
3. Step 3: Cross multiply
   1,435.07x = 1,980.41 × 805.73
4. Step 4: Simplify right side
   1,435.07x = 1,595,668.78
5. Step 5: Solve for x
   x = 1,595,668.78/1,435.07
6. Step 6: Final answer
   x = 1,111.91