Finding the Third Proportional to 66,648.50 and 140,789

Step by Step Solution

1. Step 1: Write the proportion equation
   66,648.50 : 140,789 = 140,789 : x
2. Step 2: Convert to fraction form
   66,648.50/140,789 = 140,789/x
3. Step 3: Cross multiply
   66,648.50x = 140,789 × 140,789
4. Step 4: Simplify right side
   66,648.50x = 19,821,542,521
5. Step 5: Solve for x
   x = 19,821,542,521/66,648.50
6. Step 6: Final answer
   x = 297,404.18