Finding the Third Proportional to 138,241.69 and 208,630.69

Step by Step Solution

1. Step 1: Write the proportion equation
   138,241.69 : 208,630.69 = 208,630.69 : x
2. Step 2: Convert to fraction form
   138,241.69/208,630.69 = 208,630.69/x
3. Step 3: Cross multiply
   138,241.69x = 208,630.69 × 208,630.69
4. Step 4: Simplify right side
   138,241.69x = 43,526,763,766.72
5. Step 5: Solve for x
   x = 43,526,763,766.72/138,241.69
6. Step 6: Final answer
   x = 314,859.90