Finding the Third Proportional to 144,203.50 and 309,737

Step by Step Solution

1. Step 1: Write the proportion equation
   144,203.50 : 309,737 = 309,737 : x
2. Step 2: Convert to fraction form
   144,203.50/309,737 = 309,737/x
3. Step 3: Cross multiply
   144,203.50x = 309,737 × 309,737
4. Step 4: Simplify right side
   144,203.50x = 95,937,009,169
5. Step 5: Solve for x
   x = 95,937,009,169/144,203.50
6. Step 6: Final answer
   x = 665,289.05