Finding the Third Proportional to 16,638.75 and 22,420.13

Step by Step Solution

1. Step 1: Write the proportion equation
   16,638.75 : 22,420.13 = 22,420.13 : x
2. Step 2: Convert to fraction form
   16,638.75/22,420.13 = 22,420.13/x
3. Step 3: Cross multiply
   16,638.75x = 22,420.13 × 22,420.13
4. Step 4: Simplify right side
   16,638.75x = 502,662,005.02
5. Step 5: Solve for x
   x = 502,662,005.02/16,638.75
6. Step 6: Final answer
   x = 30,210.32