Finding the Third Proportional to 42,276 and 99,979

Step by Step Solution

1. Step 1: Write the proportion equation
   42,276 : 99,979 = 99,979 : x
2. Step 2: Convert to fraction form
   42,276/99,979 = 99,979/x
3. Step 3: Cross multiply
   42,276x = 99,979 × 99,979
4. Step 4: Simplify right side
   42,276x = 9,995,800,441
5. Step 5: Solve for x
   x = 9,995,800,441/42,276
6. Step 6: Final answer
   x = 236,441.49