Finding the Third Proportional to 196,510 and 421,060

Step by Step Solution

1. Step 1: Write the proportion equation
   196,510 : 421,060 = 421,060 : x
2. Step 2: Convert to fraction form
   196,510/421,060 = 421,060/x
3. Step 3: Cross multiply
   196,510x = 421,060 × 421,060
4. Step 4: Simplify right side
   196,510x = 177,291,523,600
5. Step 5: Solve for x
   x = 177,291,523,600/196,510
6. Step 6: Final answer
   x = 902,201.03