Finding the Third Proportional to 90,805.50 and 141,057

Step by Step Solution

1. Step 1: Write the proportion equation
   90,805.50 : 141,057 = 141,057 : x
2. Step 2: Convert to fraction form
   90,805.50/141,057 = 141,057/x
3. Step 3: Cross multiply
   90,805.50x = 141,057 × 141,057
4. Step 4: Simplify right side
   90,805.50x = 19,897,077,249
5. Step 5: Solve for x
   x = 19,897,077,249/90,805.50
6. Step 6: Final answer
   x = 219,117.53