Finding the Third Proportional to 9,661.78 and 21,168.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,661.78 : 21,168.84 = 21,168.84 : x
2. Step 2: Convert to fraction form
   9,661.78/21,168.84 = 21,168.84/x
3. Step 3: Cross multiply
   9,661.78x = 21,168.84 × 21,168.84
4. Step 4: Simplify right side
   9,661.78x = 448,119,945.71
5. Step 5: Solve for x
   x = 448,119,945.71/9,661.78
6. Step 6: Final answer
   x = 46,380.68