Finding the Fourth Proportional to 3,575.17, 5,362.90 and 978.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,575.17 : 5,362.90 = 978.10 : x
2. Step 2: Convert to fraction form
   3,575.17/5,362.90 = 978.10/x
3. Step 3: Cross multiply
   3,575.17x = 5,362.90 × 978.10
4. Step 4: Simplify right side
   3,575.17x = 5,245,452.49
5. Step 5: Solve for x
   x = 5,245,452.49/3,575.17
6. Step 6: Final answer
   x = 1,467.19