Finding the Third Proportional to 145,116.56 and 318,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   145,116.56 : 318,185.72 = 318,185.72 : x
2. Step 2: Convert to fraction form
   145,116.56/318,185.72 = 318,185.72/x
3. Step 3: Cross multiply
   145,116.56x = 318,185.72 × 318,185.72
4. Step 4: Simplify right side
   145,116.56x = 101,242,151,616.45
5. Step 5: Solve for x
   x = 101,242,151,616.45/145,116.56
6. Step 6: Final answer
   x = 697,660.90