Finding the Fourth Proportional to 3,575.22, 5,362.80 and 978.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,575.22 : 5,362.80 = 978.15 : x
2. Step 2: Convert to fraction form
   3,575.22/5,362.80 = 978.15/x
3. Step 3: Cross multiply
   3,575.22x = 5,362.80 × 978.15
4. Step 4: Simplify right side
   3,575.22x = 5,245,622.82
5. Step 5: Solve for x
   x = 5,245,622.82/3,575.22
6. Step 6: Final answer
   x = 1,467.22