Finding the Third Proportional to 69,079.50 and 148,729.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69,079.50 : 148,729.50 = 148,729.50 : x
2. Step 2: Convert to fraction form
   69,079.50/148,729.50 = 148,729.50/x
3. Step 3: Cross multiply
   69,079.50x = 148,729.50 × 148,729.50
4. Step 4: Simplify right side
   69,079.50x = 22,120,464,170.25
5. Step 5: Solve for x
   x = 22,120,464,170.25/69,079.50
6. Step 6: Final answer
   x = 320,217.49