Finding the Third Proportional to 162,436 and 243,653

Step by Step Solution

1. Step 1: Write the proportion equation
   162,436 : 243,653 = 243,653 : x
2. Step 2: Convert to fraction form
   162,436/243,653 = 243,653/x
3. Step 3: Cross multiply
   162,436x = 243,653 × 243,653
4. Step 4: Simplify right side
   162,436x = 59,366,784,409
5. Step 5: Solve for x
   x = 59,366,784,409/162,436
6. Step 6: Final answer
   x = 365,478.00