Finding the Third Proportional to 9,640.69 and 21,496.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,640.69 : 21,496.78 = 21,496.78 : x
2. Step 2: Convert to fraction form
   9,640.69/21,496.78 = 21,496.78/x
3. Step 3: Cross multiply
   9,640.69x = 21,496.78 × 21,496.78
4. Step 4: Simplify right side
   9,640.69x = 462,111,604.11
5. Step 5: Solve for x
   x = 462,111,604.11/9,640.69
6. Step 6: Final answer
   x = 47,933.47