Finding the Third Proportional to 90,408 and 131,508

Step by Step Solution

1. Step 1: Write the proportion equation
   90,408 : 131,508 = 131,508 : x
2. Step 2: Convert to fraction form
   90,408/131,508 = 131,508/x
3. Step 3: Cross multiply
   90,408x = 131,508 × 131,508
4. Step 4: Simplify right side
   90,408x = 17,294,354,064
5. Step 5: Solve for x
   x = 17,294,354,064/90,408
6. Step 6: Final answer
   x = 191,292.30