Finding the Third Proportional to 90,780 and 140,892

Step by Step Solution

1. Step 1: Write the proportion equation
   90,780 : 140,892 = 140,892 : x
2. Step 2: Convert to fraction form
   90,780/140,892 = 140,892/x
3. Step 3: Cross multiply
   90,780x = 140,892 × 140,892
4. Step 4: Simplify right side
   90,780x = 19,850,555,664
5. Step 5: Solve for x
   x = 19,850,555,664/90,780
6. Step 6: Final answer
   x = 218,666.62