Finding the Third Proportional to 21,858.75 and 40,664.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,858.75 : 40,664.25 = 40,664.25 : x
2. Step 2: Convert to fraction form
   21,858.75/40,664.25 = 40,664.25/x
3. Step 3: Cross multiply
   21,858.75x = 40,664.25 × 40,664.25
4. Step 4: Simplify right side
   21,858.75x = 1,653,581,228.06
5. Step 5: Solve for x
   x = 1,653,581,228.06/21,858.75
6. Step 6: Final answer
   x = 75,648.48