Finding the Third Proportional to 90,722 and 128,982

Step by Step Solution

1. Step 1: Write the proportion equation
   90,722 : 128,982 = 128,982 : x
2. Step 2: Convert to fraction form
   90,722/128,982 = 128,982/x
3. Step 3: Cross multiply
   90,722x = 128,982 × 128,982
4. Step 4: Simplify right side
   90,722x = 16,636,356,324
5. Step 5: Solve for x
   x = 16,636,356,324/90,722
6. Step 6: Final answer
   x = 183,377.31