Finding the Third Proportional to 21,168 and 45,979

Step by Step Solution

1. Step 1: Write the proportion equation
   21,168 : 45,979 = 45,979 : x
2. Step 2: Convert to fraction form
   21,168/45,979 = 45,979/x
3. Step 3: Cross multiply
   21,168x = 45,979 × 45,979
4. Step 4: Simplify right side
   21,168x = 2,114,068,441
5. Step 5: Solve for x
   x = 2,114,068,441/21,168
6. Step 6: Final answer
   x = 99,870.96