Finding the Fourth Proportional to 3,575.12, 5,362.51 and 978.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,575.12 : 5,362.51 = 978.05 : x
2. Step 2: Convert to fraction form
   3,575.12/5,362.51 = 978.05/x
3. Step 3: Cross multiply
   3,575.12x = 5,362.51 × 978.05
4. Step 4: Simplify right side
   3,575.12x = 5,244,802.91
5. Step 5: Solve for x
   x = 5,244,802.91/3,575.12
6. Step 6: Final answer
   x = 1,467.03