Finding the Third Proportional to 90,216 and 137,448

Step by Step Solution

1. Step 1: Write the proportion equation
   90,216 : 137,448 = 137,448 : x
2. Step 2: Convert to fraction form
   90,216/137,448 = 137,448/x
3. Step 3: Cross multiply
   90,216x = 137,448 × 137,448
4. Step 4: Simplify right side
   90,216x = 18,891,952,704
5. Step 5: Solve for x
   x = 18,891,952,704/90,216
6. Step 6: Final answer
   x = 209,408.01