Finding the Third Proportional to 90,882 and 139,503

Step by Step Solution

1. Step 1: Write the proportion equation
   90,882 : 139,503 = 139,503 : x
2. Step 2: Convert to fraction form
   90,882/139,503 = 139,503/x
3. Step 3: Cross multiply
   90,882x = 139,503 × 139,503
4. Step 4: Simplify right side
   90,882x = 19,461,087,009
5. Step 5: Solve for x
   x = 19,461,087,009/90,882
6. Step 6: Final answer
   x = 214,135.77