Finding the Third Proportional to 69,689.25 and 148,369.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,689.25 : 148,369.50 = 148,369.50 : x
2. Step 2: Convert to fraction form
   69,689.25/148,369.50 = 148,369.50/x
3. Step 3: Cross multiply
   69,689.25x = 148,369.50 × 148,369.50
4. Step 4: Simplify right side
   69,689.25x = 22,013,508,530.25
5. Step 5: Solve for x
   x = 22,013,508,530.25/69,689.25
6. Step 6: Final answer
   x = 315,880.98