Finding the Third Proportional to 978.38 and 2,110.88

Step by Step Solution

1. Step 1: Write the proportion equation
   978.38 : 2,110.88 = 2,110.88 : x
2. Step 2: Convert to fraction form
   978.38/2,110.88 = 2,110.88/x
3. Step 3: Cross multiply
   978.38x = 2,110.88 × 2,110.88
4. Step 4: Simplify right side
   978.38x = 4,455,793.27
5. Step 5: Solve for x
   x = 4,455,793.27/978.38
6. Step 6: Final answer
   x = 4,554.28