Finding the Third Proportional to 139,630.50 and 301,399

Step by Step Solution

1. Step 1: Write the proportion equation
   139,630.50 : 301,399 = 301,399 : x
2. Step 2: Convert to fraction form
   139,630.50/301,399 = 301,399/x
3. Step 3: Cross multiply
   139,630.50x = 301,399 × 301,399
4. Step 4: Simplify right side
   139,630.50x = 90,841,357,201
5. Step 5: Solve for x
   x = 90,841,357,201/139,630.50
6. Step 6: Final answer
   x = 650,583.91