Finding the Third Proportional to 129,043.50 and 303,609

Step by Step Solution

1. Step 1: Write the proportion equation
   129,043.50 : 303,609 = 303,609 : x
2. Step 2: Convert to fraction form
   129,043.50/303,609 = 303,609/x
3. Step 3: Cross multiply
   129,043.50x = 303,609 × 303,609
4. Step 4: Simplify right side
   129,043.50x = 92,178,424,881
5. Step 5: Solve for x
   x = 92,178,424,881/129,043.50
6. Step 6: Final answer
   x = 714,320.56