Finding the Third Proportional to 145,389 and 308,385

Step by Step Solution

1. Step 1: Write the proportion equation
   145,389 : 308,385 = 308,385 : x
2. Step 2: Convert to fraction form
   145,389/308,385 = 308,385/x
3. Step 3: Cross multiply
   145,389x = 308,385 × 308,385
4. Step 4: Simplify right side
   145,389x = 95,101,308,225
5. Step 5: Solve for x
   x = 95,101,308,225/145,389
6. Step 6: Final answer
   x = 654,116.26