Finding the Third Proportional to 21,723 and 30,316.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,723 : 30,316.50 = 30,316.50 : x
2. Step 2: Convert to fraction form
   21,723/30,316.50 = 30,316.50/x
3. Step 3: Cross multiply
   21,723x = 30,316.50 × 30,316.50
4. Step 4: Simplify right side
   21,723x = 919,090,172.25
5. Step 5: Solve for x
   x = 919,090,172.25/21,723
6. Step 6: Final answer
   x = 42,309.54