Finding the Third Proportional to 9,687.38 and 20,518.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,687.38 : 20,518.88 = 20,518.88 : x
2. Step 2: Convert to fraction form
   9,687.38/20,518.88 = 20,518.88/x
3. Step 3: Cross multiply
   9,687.38x = 20,518.88 × 20,518.88
4. Step 4: Simplify right side
   9,687.38x = 421,024,231.27
5. Step 5: Solve for x
   x = 421,024,231.27/9,687.38
6. Step 6: Final answer
   x = 43,461.13