Finding the Third Proportional to 4,680.28 and 9,937.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,680.28 : 9,937.69 = 9,937.69 : x
2. Step 2: Convert to fraction form
   4,680.28/9,937.69 = 9,937.69/x
3. Step 3: Cross multiply
   4,680.28x = 9,937.69 × 9,937.69
4. Step 4: Simplify right side
   4,680.28x = 98,757,632.85
5. Step 5: Solve for x
   x = 98,757,632.85/4,680.28
6. Step 6: Final answer
   x = 21,100.79