Finding the Third Proportional to 15,305.63 and 21,665.81

Step by Step Solution

1. Step 1: Write the proportion equation
   15,305.63 : 21,665.81 = 21,665.81 : x
2. Step 2: Convert to fraction form
   15,305.63/21,665.81 = 21,665.81/x
3. Step 3: Cross multiply
   15,305.63x = 21,665.81 × 21,665.81
4. Step 4: Simplify right side
   15,305.63x = 469,407,431.29
5. Step 5: Solve for x
   x = 469,407,431.29/15,305.63
6. Step 6: Final answer
   x = 30,668.95