Finding the Third Proportional to 149,606 and 218,622.75

Step by Step Solution

1. Step 1: Write the proportion equation
   149,606 : 218,622.75 = 218,622.75 : x
2. Step 2: Convert to fraction form
   149,606/218,622.75 = 218,622.75/x
3. Step 3: Cross multiply
   149,606x = 218,622.75 × 218,622.75
4. Step 4: Simplify right side
   149,606x = 47,795,906,817.56
5. Step 5: Solve for x
   x = 47,795,906,817.56/149,606
6. Step 6: Final answer
   x = 319,478.54