Finding the Third Proportional to 305,910 and 620,362.50

Step by Step Solution

1. Step 1: Write the proportion equation
   305,910 : 620,362.50 = 620,362.50 : x
2. Step 2: Convert to fraction form
   305,910/620,362.50 = 620,362.50/x
3. Step 3: Cross multiply
   305,910x = 620,362.50 × 620,362.50
4. Step 4: Simplify right side
   305,910x = 384,849,631,406.25
5. Step 5: Solve for x
   x = 384,849,631,406.25/305,910
6. Step 6: Final answer
   x = 1,258,048.55