Finding the Fourth Proportional to 1,280.62, 1,921.56 and 793.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.62 : 1,921.56 = 793.54 : x
2. Step 2: Convert to fraction form
   1,280.62/1,921.56 = 793.54/x
3. Step 3: Cross multiply
   1,280.62x = 1,921.56 × 793.54
4. Step 4: Simplify right side
   1,280.62x = 1,524,834.72
5. Step 5: Solve for x
   x = 1,524,834.72/1,280.62
6. Step 6: Final answer
   x = 1,190.70