Finding the Third Proportional to 145,570.78 and 308,637.56

Step by Step Solution

1. Step 1: Write the proportion equation
   145,570.78 : 308,637.56 = 308,637.56 : x
2. Step 2: Convert to fraction form
   145,570.78/308,637.56 = 308,637.56/x
3. Step 3: Cross multiply
   145,570.78x = 308,637.56 × 308,637.56
4. Step 4: Simplify right side
   145,570.78x = 95,257,144,985.94
5. Step 5: Solve for x
   x = 95,257,144,985.94/145,570.78
6. Step 6: Final answer
   x = 654,369.95