Finding the Third Proportional to 91,921 and 140,553

Step by Step Solution

1. Step 1: Write the proportion equation
   91,921 : 140,553 = 140,553 : x
2. Step 2: Convert to fraction form
   91,921/140,553 = 140,553/x
3. Step 3: Cross multiply
   91,921x = 140,553 × 140,553
4. Step 4: Simplify right side
   91,921x = 19,755,145,809
5. Step 5: Solve for x
   x = 19,755,145,809/91,921
6. Step 6: Final answer
   x = 214,914.39