Finding the Fourth Proportional to 978.76, 1,467.59 and 670.96

Step by Step Solution

1. Step 1: Write the proportion equation
   978.76 : 1,467.59 = 670.96 : x
2. Step 2: Convert to fraction form
   978.76/1,467.59 = 670.96/x
3. Step 3: Cross multiply
   978.76x = 1,467.59 × 670.96
4. Step 4: Simplify right side
   978.76x = 984,683.49
5. Step 5: Solve for x
   x = 984,683.49/978.76
6. Step 6: Final answer
   x = 1,006.06