Finding the Third Proportional to 316,305 and 682,432.50

Step by Step Solution

1. Step 1: Write the proportion equation
   316,305 : 682,432.50 = 682,432.50 : x
2. Step 2: Convert to fraction form
   316,305/682,432.50 = 682,432.50/x
3. Step 3: Cross multiply
   316,305x = 682,432.50 × 682,432.50
4. Step 4: Simplify right side
   316,305x = 465,714,117,056.25
5. Step 5: Solve for x
   x = 465,714,117,056.25/316,305
6. Step 6: Final answer
   x = 1,472,357.75