Finding the Third Proportional to 89,262 and 128,979

Step by Step Solution

1. Step 1: Write the proportion equation
   89,262 : 128,979 = 128,979 : x
2. Step 2: Convert to fraction form
   89,262/128,979 = 128,979/x
3. Step 3: Cross multiply
   89,262x = 128,979 × 128,979
4. Step 4: Simplify right side
   89,262x = 16,635,582,441
5. Step 5: Solve for x
   x = 16,635,582,441/89,262
6. Step 6: Final answer
   x = 186,368.02