Finding the Third Proportional to 978 and 2,308.88

Step by Step Solution

1. Step 1: Write the proportion equation
   978 : 2,308.88 = 2,308.88 : x
2. Step 2: Convert to fraction form
   978/2,308.88 = 2,308.88/x
3. Step 3: Cross multiply
   978x = 2,308.88 × 2,308.88
4. Step 4: Simplify right side
   978x = 5,330,903.77
5. Step 5: Solve for x
   x = 5,330,903.77/978
6. Step 6: Final answer
   x = 5,450.82