Finding the Third Proportional to 4,553.72 and 9,908.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,553.72 : 9,908.72 = 9,908.72 : x
2. Step 2: Convert to fraction form
   4,553.72/9,908.72 = 9,908.72/x
3. Step 3: Cross multiply
   4,553.72x = 9,908.72 × 9,908.72
4. Step 4: Simplify right side
   4,553.72x = 98,182,707.27
5. Step 5: Solve for x
   x = 98,182,707.27/4,553.72
6. Step 6: Final answer
   x = 21,561.00