Finding the Third Proportional to 19,707.75 and 21,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,707.75 : 21,388.50 = 21,388.50 : x
2. Step 2: Convert to fraction form
   19,707.75/21,388.50 = 21,388.50/x
3. Step 3: Cross multiply
   19,707.75x = 21,388.50 × 21,388.50
4. Step 4: Simplify right side
   19,707.75x = 457,467,932.25
5. Step 5: Solve for x
   x = 457,467,932.25/19,707.75
6. Step 6: Final answer
   x = 23,212.59