Finding the Third Proportional to 145,675 and 316,986.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,675 : 316,986.50 = 316,986.50 : x
2. Step 2: Convert to fraction form
   145,675/316,986.50 = 316,986.50/x
3. Step 3: Cross multiply
   145,675x = 316,986.50 × 316,986.50
4. Step 4: Simplify right side
   145,675x = 100,480,441,182.25
5. Step 5: Solve for x
   x = 100,480,441,182.25/145,675
6. Step 6: Final answer
   x = 689,757.62