Finding the Fourth Proportional to 3,575.37, 5,362.89 and 978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,575.37 : 5,362.89 = 978.30 : x
2. Step 2: Convert to fraction form
   3,575.37/5,362.89 = 978.30/x
3. Step 3: Cross multiply
   3,575.37x = 5,362.89 × 978.30
4. Step 4: Simplify right side
   3,575.37x = 5,246,515.29
5. Step 5: Solve for x
   x = 5,246,515.29/3,575.37
6. Step 6: Final answer
   x = 1,467.40