Finding the Third Proportional to 196,510 and 424,395

Step by Step Solution

1. Step 1: Write the proportion equation
   196,510 : 424,395 = 424,395 : x
2. Step 2: Convert to fraction form
   196,510/424,395 = 424,395/x
3. Step 3: Cross multiply
   196,510x = 424,395 × 424,395
4. Step 4: Simplify right side
   196,510x = 180,111,116,025
5. Step 5: Solve for x
   x = 180,111,116,025/196,510
6. Step 6: Final answer
   x = 916,549.37