Finding the Third Proportional to 140,029.50 and 209,130

Step by Step Solution

1. Step 1: Write the proportion equation
   140,029.50 : 209,130 = 209,130 : x
2. Step 2: Convert to fraction form
   140,029.50/209,130 = 209,130/x
3. Step 3: Cross multiply
   140,029.50x = 209,130 × 209,130
4. Step 4: Simplify right side
   140,029.50x = 43,735,356,900
5. Step 5: Solve for x
   x = 43,735,356,900/140,029.50
6. Step 6: Final answer
   x = 312,329.59