Finding the Third Proportional to 87,939 and 192,510

Step by Step Solution

1. Step 1: Write the proportion equation
   87,939 : 192,510 = 192,510 : x
2. Step 2: Convert to fraction form
   87,939/192,510 = 192,510/x
3. Step 3: Cross multiply
   87,939x = 192,510 × 192,510
4. Step 4: Simplify right side
   87,939x = 37,060,100,100
5. Step 5: Solve for x
   x = 37,060,100,100/87,939
6. Step 6: Final answer
   x = 421,429.63