Finding the Third Proportional to 139,495 and 303,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,495 : 303,900.50 = 303,900.50 : x
2. Step 2: Convert to fraction form
   139,495/303,900.50 = 303,900.50/x
3. Step 3: Cross multiply
   139,495x = 303,900.50 × 303,900.50
4. Step 4: Simplify right side
   139,495x = 92,355,513,900.25
5. Step 5: Solve for x
   x = 92,355,513,900.25/139,495
6. Step 6: Final answer
   x = 662,070.42