Finding the Fourth Proportional to 978.08, 1,467.52 and 670.55

Step by Step Solution

1. Step 1: Write the proportion equation
   978.08 : 1,467.52 = 670.55 : x
2. Step 2: Convert to fraction form
   978.08/1,467.52 = 670.55/x
3. Step 3: Cross multiply
   978.08x = 1,467.52 × 670.55
4. Step 4: Simplify right side
   978.08x = 984,036.52
5. Step 5: Solve for x
   x = 984,036.52/978.08
6. Step 6: Final answer
   x = 1,006.10