Finding the Third Proportional to 90,003 and 212,189

Step by Step Solution

1. Step 1: Write the proportion equation
   90,003 : 212,189 = 212,189 : x
2. Step 2: Convert to fraction form
   90,003/212,189 = 212,189/x
3. Step 3: Cross multiply
   90,003x = 212,189 × 212,189
4. Step 4: Simplify right side
   90,003x = 45,024,171,721
5. Step 5: Solve for x
   x = 45,024,171,721/90,003
6. Step 6: Final answer
   x = 500,251.90