Finding the Third Proportional to 63,789 and 139,231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   63,789 : 139,231.50 = 139,231.50 : x
2. Step 2: Convert to fraction form
   63,789/139,231.50 = 139,231.50/x
3. Step 3: Cross multiply
   63,789x = 139,231.50 × 139,231.50
4. Step 4: Simplify right side
   63,789x = 19,385,410,592.25
5. Step 5: Solve for x
   x = 19,385,410,592.25/63,789
6. Step 6: Final answer
   x = 303,898.96