Finding the Third Proportional to 161,836 and 253,340

Step by Step Solution

1. Step 1: Write the proportion equation
   161,836 : 253,340 = 253,340 : x
2. Step 2: Convert to fraction form
   161,836/253,340 = 253,340/x
3. Step 3: Cross multiply
   161,836x = 253,340 × 253,340
4. Step 4: Simplify right side
   161,836x = 64,181,155,600
5. Step 5: Solve for x
   x = 64,181,155,600/161,836
6. Step 6: Final answer
   x = 396,581.45