Finding the Third Proportional to 145,674 and 316,984.50

Step by Step Solution

1. Step 1: Write the proportion equation
   145,674 : 316,984.50 = 316,984.50 : x
2. Step 2: Convert to fraction form
   145,674/316,984.50 = 316,984.50/x
3. Step 3: Cross multiply
   145,674x = 316,984.50 × 316,984.50
4. Step 4: Simplify right side
   145,674x = 100,479,173,240.25
5. Step 5: Solve for x
   x = 100,479,173,240.25/145,674
6. Step 6: Final answer
   x = 689,753.65