Finding the Fourth Proportional to 1,078.48, 1,608.50 and 980.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.48 : 1,608.50 = 980.56 : x
2. Step 2: Convert to fraction form
   1,078.48/1,608.50 = 980.56/x
3. Step 3: Cross multiply
   1,078.48x = 1,608.50 × 980.56
4. Step 4: Simplify right side
   1,078.48x = 1,577,230.76
5. Step 5: Solve for x
   x = 1,577,230.76/1,078.48
6. Step 6: Final answer
   x = 1,462.46