Finding the Fourth Proportional to 3,575.82, 5,362.77 and 978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,575.82 : 5,362.77 = 978.15 : x
2. Step 2: Convert to fraction form
   3,575.82/5,362.77 = 978.15/x
3. Step 3: Cross multiply
   3,575.82x = 5,362.77 × 978.15
4. Step 4: Simplify right side
   3,575.82x = 5,245,593.48
5. Step 5: Solve for x
   x = 5,245,593.48/3,575.82
6. Step 6: Final answer
   x = 1,466.96