Finding the Third Proportional to 145,590 and 308,676

Step by Step Solution

1. Step 1: Write the proportion equation
   145,590 : 308,676 = 308,676 : x
2. Step 2: Convert to fraction form
   145,590/308,676 = 308,676/x
3. Step 3: Cross multiply
   145,590x = 308,676 × 308,676
4. Step 4: Simplify right side
   145,590x = 95,280,872,976
5. Step 5: Solve for x
   x = 95,280,872,976/145,590
6. Step 6: Final answer
   x = 654,446.55