Finding the Third Proportional to 168,492 and 253,422

Step by Step Solution

1. Step 1: Write the proportion equation
   168,492 : 253,422 = 253,422 : x
2. Step 2: Convert to fraction form
   168,492/253,422 = 253,422/x
3. Step 3: Cross multiply
   168,492x = 253,422 × 253,422
4. Step 4: Simplify right side
   168,492x = 64,222,710,084
5. Step 5: Solve for x
   x = 64,222,710,084/168,492
6. Step 6: Final answer
   x = 381,161.78