Finding the Third Proportional to 137,206.50 and 300,648

Step by Step Solution

1. Step 1: Write the proportion equation
   137,206.50 : 300,648 = 300,648 : x
2. Step 2: Convert to fraction form
   137,206.50/300,648 = 300,648/x
3. Step 3: Cross multiply
   137,206.50x = 300,648 × 300,648
4. Step 4: Simplify right side
   137,206.50x = 90,389,219,904
5. Step 5: Solve for x
   x = 90,389,219,904/137,206.50
6. Step 6: Final answer
   x = 658,782.35