Finding the Fourth Proportional to 1,273.59, 1,757.70 and 801.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,273.59 : 1,757.70 = 801.09 : x
2. Step 2: Convert to fraction form
   1,273.59/1,757.70 = 801.09/x
3. Step 3: Cross multiply
   1,273.59x = 1,757.70 × 801.09
4. Step 4: Simplify right side
   1,273.59x = 1,408,075.89
5. Step 5: Solve for x
   x = 1,408,075.89/1,273.59
6. Step 6: Final answer
   x = 1,105.60