Finding the Third Proportional to 21,416.25 and 30,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,416.25 : 30,439.50 = 30,439.50 : x
2. Step 2: Convert to fraction form
   21,416.25/30,439.50 = 30,439.50/x
3. Step 3: Cross multiply
   21,416.25x = 30,439.50 × 30,439.50
4. Step 4: Simplify right side
   21,416.25x = 926,563,160.25
5. Step 5: Solve for x
   x = 926,563,160.25/21,416.25
6. Step 6: Final answer
   x = 43,264.49