Finding the Fourth Proportional to 926.72, 1,279.83 and 801.78

Step by Step Solution

1. Step 1: Write the proportion equation
   926.72 : 1,279.83 = 801.78 : x
2. Step 2: Convert to fraction form
   926.72/1,279.83 = 801.78/x
3. Step 3: Cross multiply
   926.72x = 1,279.83 × 801.78
4. Step 4: Simplify right side
   926.72x = 1,026,142.10
5. Step 5: Solve for x
   x = 1,026,142.10/926.72
6. Step 6: Final answer
   x = 1,107.28