Finding the Third Proportional to 145,657.50 and 311,556

Step by Step Solution

1. Step 1: Write the proportion equation
   145,657.50 : 311,556 = 311,556 : x
2. Step 2: Convert to fraction form
   145,657.50/311,556 = 311,556/x
3. Step 3: Cross multiply
   145,657.50x = 311,556 × 311,556
4. Step 4: Simplify right side
   145,657.50x = 97,067,141,136
5. Step 5: Solve for x
   x = 97,067,141,136/145,657.50
6. Step 6: Final answer
   x = 666,406.75