Finding the Third Proportional to 99,800 and 215,426

Step by Step Solution

1. Step 1: Write the proportion equation
   99,800 : 215,426 = 215,426 : x
2. Step 2: Convert to fraction form
   99,800/215,426 = 215,426/x
3. Step 3: Cross multiply
   99,800x = 215,426 × 215,426
4. Step 4: Simplify right side
   99,800x = 46,408,361,476
5. Step 5: Solve for x
   x = 46,408,361,476/99,800
6. Step 6: Final answer
   x = 465,013.64