Finding the Third Proportional to 16,620 and 17,916

Step by Step Solution

1. Step 1: Write the proportion equation
   16,620 : 17,916 = 17,916 : x
2. Step 2: Convert to fraction form
   16,620/17,916 = 17,916/x
3. Step 3: Cross multiply
   16,620x = 17,916 × 17,916
4. Step 4: Simplify right side
   16,620x = 320,983,056
5. Step 5: Solve for x
   x = 320,983,056/16,620
6. Step 6: Final answer
   x = 19,313.06