Finding the Third Proportional to 90,089 and 141,321

Step by Step Solution

1. Step 1: Write the proportion equation
   90,089 : 141,321 = 141,321 : x
2. Step 2: Convert to fraction form
   90,089/141,321 = 141,321/x
3. Step 3: Cross multiply
   90,089x = 141,321 × 141,321
4. Step 4: Simplify right side
   90,089x = 19,971,625,041
5. Step 5: Solve for x
   x = 19,971,625,041/90,089
6. Step 6: Final answer
   x = 221,687.72