Finding the Third Proportional to 123,243 and 195,904.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,243 : 195,904.50 = 195,904.50 : x
2. Step 2: Convert to fraction form
   123,243/195,904.50 = 195,904.50/x
3. Step 3: Cross multiply
   123,243x = 195,904.50 × 195,904.50
4. Step 4: Simplify right side
   123,243x = 38,378,573,120.25
5. Step 5: Solve for x
   x = 38,378,573,120.25/123,243
6. Step 6: Final answer
   x = 311,405.70