Finding the Third Proportional to 90,873 and 137,945

Step by Step Solution

1. Step 1: Write the proportion equation
   90,873 : 137,945 = 137,945 : x
2. Step 2: Convert to fraction form
   90,873/137,945 = 137,945/x
3. Step 3: Cross multiply
   90,873x = 137,945 × 137,945
4. Step 4: Simplify right side
   90,873x = 19,028,823,025
5. Step 5: Solve for x
   x = 19,028,823,025/90,873
6. Step 6: Final answer
   x = 209,400.19