Finding the Third Proportional to 10,509.09 and 21,991.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,509.09 : 21,991.88 = 21,991.88 : x
2. Step 2: Convert to fraction form
   10,509.09/21,991.88 = 21,991.88/x
3. Step 3: Cross multiply
   10,509.09x = 21,991.88 × 21,991.88
4. Step 4: Simplify right side
   10,509.09x = 483,642,566.02
5. Step 5: Solve for x
   x = 483,642,566.02/10,509.09
6. Step 6: Final answer
   x = 46,021.34