Finding the Third Proportional to 978.50 and 2,176

Step by Step Solution

1. Step 1: Write the proportion equation
   978.50 : 2,176 = 2,176 : x
2. Step 2: Convert to fraction form
   978.50/2,176 = 2,176/x
3. Step 3: Cross multiply
   978.50x = 2,176 × 2,176
4. Step 4: Simplify right side
   978.50x = 4,734,976
5. Step 5: Solve for x
   x = 4,734,976/978.50
6. Step 6: Final answer
   x = 4,839.01