Finding the Third Proportional to 145,312 and 311,360

Step by Step Solution

1. Step 1: Write the proportion equation
   145,312 : 311,360 = 311,360 : x
2. Step 2: Convert to fraction form
   145,312/311,360 = 311,360/x
3. Step 3: Cross multiply
   145,312x = 311,360 × 311,360
4. Step 4: Simplify right side
   145,312x = 96,945,049,600
5. Step 5: Solve for x
   x = 96,945,049,600/145,312
6. Step 6: Final answer
   x = 667,151.02