Finding the Third Proportional to 145,242 and 314,610

Step by Step Solution

1. Step 1: Write the proportion equation
   145,242 : 314,610 = 314,610 : x
2. Step 2: Convert to fraction form
   145,242/314,610 = 314,610/x
3. Step 3: Cross multiply
   145,242x = 314,610 × 314,610
4. Step 4: Simplify right side
   145,242x = 98,979,452,100
5. Step 5: Solve for x
   x = 98,979,452,100/145,242
6. Step 6: Final answer
   x = 681,479.55