Finding the Third Proportional to 145,596 and 308,688

Step by Step Solution

1. Step 1: Write the proportion equation
   145,596 : 308,688 = 308,688 : x
2. Step 2: Convert to fraction form
   145,596/308,688 = 308,688/x
3. Step 3: Cross multiply
   145,596x = 308,688 × 308,688
4. Step 4: Simplify right side
   145,596x = 95,288,281,344
5. Step 5: Solve for x
   x = 95,288,281,344/145,596
6. Step 6: Final answer
   x = 654,470.46