Finding the Fourth Proportional to 1,104.48, 1,646.60 and 980.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.48 : 1,646.60 = 980.55 : x
2. Step 2: Convert to fraction form
   1,104.48/1,646.60 = 980.55/x
3. Step 3: Cross multiply
   1,104.48x = 1,646.60 × 980.55
4. Step 4: Simplify right side
   1,104.48x = 1,614,568.73
5. Step 5: Solve for x
   x = 1,614,568.73/1,104.48
6. Step 6: Final answer
   x = 1,461.84