Finding the Fourth Proportional to 1,272.56, 1,755.50 and 799.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.56 : 1,755.50 = 799.92 : x
2. Step 2: Convert to fraction form
   1,272.56/1,755.50 = 799.92/x
3. Step 3: Cross multiply
   1,272.56x = 1,755.50 × 799.92
4. Step 4: Simplify right side
   1,272.56x = 1,404,255.56
5. Step 5: Solve for x
   x = 1,404,255.56/1,272.56
6. Step 6: Final answer
   x = 1,103.49