Finding the Third Proportional to 162,642 and 253,799.63

Step by Step Solution

1. Step 1: Write the proportion equation
   162,642 : 253,799.63 = 253,799.63 : x
2. Step 2: Convert to fraction form
   162,642/253,799.63 = 253,799.63/x
3. Step 3: Cross multiply
   162,642x = 253,799.63 × 253,799.63
4. Step 4: Simplify right side
   162,642x = 64,414,249,650.14
5. Step 5: Solve for x
   x = 64,414,249,650.14/162,642
6. Step 6: Final answer
   x = 396,049.30