Finding the Fourth Proportional to 2,259.72, 3,387.72 and 799.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,259.72 : 3,387.72 = 799.80 : x
2. Step 2: Convert to fraction form
   2,259.72/3,387.72 = 799.80/x
3. Step 3: Cross multiply
   2,259.72x = 3,387.72 × 799.80
4. Step 4: Simplify right side
   2,259.72x = 2,709,498.46
5. Step 5: Solve for x
   x = 2,709,498.46/2,259.72
6. Step 6: Final answer
   x = 1,199.04