Finding the Third Proportional to 68,470 and 148,172

Step by Step Solution

1. Step 1: Write the proportion equation
   68,470 : 148,172 = 148,172 : x
2. Step 2: Convert to fraction form
   68,470/148,172 = 148,172/x
3. Step 3: Cross multiply
   68,470x = 148,172 × 148,172
4. Step 4: Simplify right side
   68,470x = 21,954,941,584
5. Step 5: Solve for x
   x = 21,954,941,584/68,470
6. Step 6: Final answer
   x = 320,650.53