Finding the Third Proportional to 148,918 and 321,162

Step by Step Solution

1. Step 1: Write the proportion equation
   148,918 : 321,162 = 321,162 : x
2. Step 2: Convert to fraction form
   148,918/321,162 = 321,162/x
3. Step 3: Cross multiply
   148,918x = 321,162 × 321,162
4. Step 4: Simplify right side
   148,918x = 103,145,030,244
5. Step 5: Solve for x
   x = 103,145,030,244/148,918
6. Step 6: Final answer
   x = 692,629.70