Finding the Third Proportional to 9,135.28 and 21,520.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,135.28 : 21,520.69 = 21,520.69 : x
2. Step 2: Convert to fraction form
   9,135.28/21,520.69 = 21,520.69/x
3. Step 3: Cross multiply
   9,135.28x = 21,520.69 × 21,520.69
4. Step 4: Simplify right side
   9,135.28x = 463,139,990.47
5. Step 5: Solve for x
   x = 463,139,990.47/9,135.28
6. Step 6: Final answer
   x = 50,697.95