Finding the Third Proportional to 64,764.75 and 139,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   64,764.75 : 139,285.50 = 139,285.50 : x
2. Step 2: Convert to fraction form
   64,764.75/139,285.50 = 139,285.50/x
3. Step 3: Cross multiply
   64,764.75x = 139,285.50 × 139,285.50
4. Step 4: Simplify right side
   64,764.75x = 19,400,450,510.25
5. Step 5: Solve for x
   x = 19,400,450,510.25/64,764.75
6. Step 6: Final answer
   x = 299,552.62