Finding the Third Proportional to 15,448.50 and 21,057.75

Step by Step Solution

1. Step 1: Write the proportion equation
   15,448.50 : 21,057.75 = 21,057.75 : x
2. Step 2: Convert to fraction form
   15,448.50/21,057.75 = 21,057.75/x
3. Step 3: Cross multiply
   15,448.50x = 21,057.75 × 21,057.75
4. Step 4: Simplify right side
   15,448.50x = 443,428,835.06
5. Step 5: Solve for x
   x = 443,428,835.06/15,448.50
6. Step 6: Final answer
   x = 28,703.68