Finding the Third Proportional to 129,738 and 281,629.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,738 : 281,629.50 = 281,629.50 : x
2. Step 2: Convert to fraction form
   129,738/281,629.50 = 281,629.50/x
3. Step 3: Cross multiply
   129,738x = 281,629.50 × 281,629.50
4. Step 4: Simplify right side
   129,738x = 79,315,175,270.25
5. Step 5: Solve for x
   x = 79,315,175,270.25/129,738
6. Step 6: Final answer
   x = 611,348.84