Finding the Third Proportional to 11,147.63 and 20,710.69

Step by Step Solution

1. Step 1: Write the proportion equation
   11,147.63 : 20,710.69 = 20,710.69 : x
2. Step 2: Convert to fraction form
   11,147.63/20,710.69 = 20,710.69/x
3. Step 3: Cross multiply
   11,147.63x = 20,710.69 × 20,710.69
4. Step 4: Simplify right side
   11,147.63x = 428,932,576.72
5. Step 5: Solve for x
   x = 428,932,576.72/11,147.63
6. Step 6: Final answer
   x = 38,477.49