Finding the Third Proportional to 315,306 and 488,449.50

Step by Step Solution

1. Step 1: Write the proportion equation
   315,306 : 488,449.50 = 488,449.50 : x
2. Step 2: Convert to fraction form
   315,306/488,449.50 = 488,449.50/x
3. Step 3: Cross multiply
   315,306x = 488,449.50 × 488,449.50
4. Step 4: Simplify right side
   315,306x = 238,582,914,050.25
5. Step 5: Solve for x
   x = 238,582,914,050.25/315,306
6. Step 6: Final answer
   x = 756,671.02