Finding the Third Proportional to 64,981.50 and 139,632.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,981.50 : 139,632.75 = 139,632.75 : x
2. Step 2: Convert to fraction form
   64,981.50/139,632.75 = 139,632.75/x
3. Step 3: Cross multiply
   64,981.50x = 139,632.75 × 139,632.75
4. Step 4: Simplify right side
   64,981.50x = 19,497,304,872.56
5. Step 5: Solve for x
   x = 19,497,304,872.56/64,981.50
6. Step 6: Final answer
   x = 300,043.93