Finding the Third Proportional to 90,721 and 196,973

Step by Step Solution

1. Step 1: Write the proportion equation
   90,721 : 196,973 = 196,973 : x
2. Step 2: Convert to fraction form
   90,721/196,973 = 196,973/x
3. Step 3: Cross multiply
   90,721x = 196,973 × 196,973
4. Step 4: Simplify right side
   90,721x = 38,798,362,729
5. Step 5: Solve for x
   x = 38,798,362,729/90,721
6. Step 6: Final answer
   x = 427,666.83