Finding the Third Proportional to 90,418 and 197,036

Step by Step Solution

1. Step 1: Write the proportion equation
   90,418 : 197,036 = 197,036 : x
2. Step 2: Convert to fraction form
   90,418/197,036 = 197,036/x
3. Step 3: Cross multiply
   90,418x = 197,036 × 197,036
4. Step 4: Simplify right side
   90,418x = 38,823,185,296
5. Step 5: Solve for x
   x = 38,823,185,296/90,418
6. Step 6: Final answer
   x = 429,374.52