Finding the Fourth Proportional to 3,577.82, 5,365.77 and 980.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,577.82 : 5,365.77 = 980.15 : x
2. Step 2: Convert to fraction form
   3,577.82/5,365.77 = 980.15/x
3. Step 3: Cross multiply
   3,577.82x = 5,365.77 × 980.15
4. Step 4: Simplify right side
   3,577.82x = 5,259,259.47
5. Step 5: Solve for x
   x = 5,259,259.47/3,577.82
6. Step 6: Final answer
   x = 1,469.96