Finding the Third Proportional to 145,573.50 and 308,643

Step by Step Solution

1. Step 1: Write the proportion equation
   145,573.50 : 308,643 = 308,643 : x
2. Step 2: Convert to fraction form
   145,573.50/308,643 = 308,643/x
3. Step 3: Cross multiply
   145,573.50x = 308,643 × 308,643
4. Step 4: Simplify right side
   145,573.50x = 95,260,501,449
5. Step 5: Solve for x
   x = 95,260,501,449/145,573.50
6. Step 6: Final answer
   x = 654,380.79