Finding the Third Proportional to 315,920 and 500,160

Step by Step Solution

1. Step 1: Write the proportion equation
   315,920 : 500,160 = 500,160 : x
2. Step 2: Convert to fraction form
   315,920/500,160 = 500,160/x
3. Step 3: Cross multiply
   315,920x = 500,160 × 500,160
4. Step 4: Simplify right side
   315,920x = 250,160,025,600
5. Step 5: Solve for x
   x = 250,160,025,600/315,920
6. Step 6: Final answer
   x = 791,846.12