Finding the Third Proportional to 162,432 and 243,648

Step by Step Solution

1. Step 1: Write the proportion equation
   162,432 : 243,648 = 243,648 : x
2. Step 2: Convert to fraction form
   162,432/243,648 = 243,648/x
3. Step 3: Cross multiply
   162,432x = 243,648 × 243,648
4. Step 4: Simplify right side
   162,432x = 59,364,347,904
5. Step 5: Solve for x
   x = 59,364,347,904/162,432
6. Step 6: Final answer
   x = 365,472