Finding the Third Proportional to 64,849.50 and 139,704.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,849.50 : 139,704.75 = 139,704.75 : x
2. Step 2: Convert to fraction form
   64,849.50/139,704.75 = 139,704.75/x
3. Step 3: Cross multiply
   64,849.50x = 139,704.75 × 139,704.75
4. Step 4: Simplify right side
   64,849.50x = 19,517,417,172.56
5. Step 5: Solve for x
   x = 19,517,417,172.56/64,849.50
6. Step 6: Final answer
   x = 300,964.81