Finding the Third Proportional to 90,210 and 195,789

Step by Step Solution

1. Step 1: Write the proportion equation
   90,210 : 195,789 = 195,789 : x
2. Step 2: Convert to fraction form
   90,210/195,789 = 195,789/x
3. Step 3: Cross multiply
   90,210x = 195,789 × 195,789
4. Step 4: Simplify right side
   90,210x = 38,333,332,521
5. Step 5: Solve for x
   x = 38,333,332,521/90,210
6. Step 6: Final answer
   x = 424,934.40