Finding the Third Proportional to 148,608 and 319,450.50

Step by Step Solution

1. Step 1: Write the proportion equation
   148,608 : 319,450.50 = 319,450.50 : x
2. Step 2: Convert to fraction form
   148,608/319,450.50 = 319,450.50/x
3. Step 3: Cross multiply
   148,608x = 319,450.50 × 319,450.50
4. Step 4: Simplify right side
   148,608x = 102,048,621,950.25
5. Step 5: Solve for x
   x = 102,048,621,950.25/148,608
6. Step 6: Final answer
   x = 686,696.69