Finding the Fourth Proportional to 1,435.02, 1,980.27 and 805.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.02 : 1,980.27 = 805.50 : x
2. Step 2: Convert to fraction form
   1,435.02/1,980.27 = 805.50/x
3. Step 3: Cross multiply
   1,435.02x = 1,980.27 × 805.50
4. Step 4: Simplify right side
   1,435.02x = 1,595,107.49
5. Step 5: Solve for x
   x = 1,595,107.49/1,435.02
6. Step 6: Final answer
   x = 1,111.56