Finding the Third Proportional to 124,648 and 253,136

Step by Step Solution

1. Step 1: Write the proportion equation
   124,648 : 253,136 = 253,136 : x
2. Step 2: Convert to fraction form
   124,648/253,136 = 253,136/x
3. Step 3: Cross multiply
   124,648x = 253,136 × 253,136
4. Step 4: Simplify right side
   124,648x = 64,077,834,496
5. Step 5: Solve for x
   x = 64,077,834,496/124,648
6. Step 6: Final answer
   x = 514,070.30