Finding the Fourth Proportional to 1,047.15, 1,443.33 and 920.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,047.15 : 1,443.33 = 920.79 : x
2. Step 2: Convert to fraction form
   1,047.15/1,443.33 = 920.79/x
3. Step 3: Cross multiply
   1,047.15x = 1,443.33 × 920.79
4. Step 4: Simplify right side
   1,047.15x = 1,329,003.83
5. Step 5: Solve for x
   x = 1,329,003.83/1,047.15
6. Step 6: Final answer
   x = 1,269.16