Finding the Fourth Proportional to 1,359.72, 2,041.40 and 805.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.72 : 2,041.40 = 805.46 : x
2. Step 2: Convert to fraction form
   1,359.72/2,041.40 = 805.46/x
3. Step 3: Cross multiply
   1,359.72x = 2,041.40 × 805.46
4. Step 4: Simplify right side
   1,359.72x = 1,644,251.81
5. Step 5: Solve for x
   x = 1,644,251.81/1,359.72
6. Step 6: Final answer
   x = 1,209.26