Finding the Third Proportional to 306,180 and 661,648.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,180 : 661,648.50 = 661,648.50 : x
2. Step 2: Convert to fraction form
   306,180/661,648.50 = 661,648.50/x
3. Step 3: Cross multiply
   306,180x = 661,648.50 × 661,648.50
4. Step 4: Simplify right side
   306,180x = 437,778,737,552.25
5. Step 5: Solve for x
   x = 437,778,737,552.25/306,180
6. Step 6: Final answer
   x = 1,429,808.41