Finding the Third Proportional to 50,440 and 70,690

Step by Step Solution

1. Step 1: Write the proportion equation
   50,440 : 70,690 = 70,690 : x
2. Step 2: Convert to fraction form
   50,440/70,690 = 70,690/x
3. Step 3: Cross multiply
   50,440x = 70,690 × 70,690
4. Step 4: Simplify right side
   50,440x = 4,997,076,100
5. Step 5: Solve for x
   x = 4,997,076,100/50,440
6. Step 6: Final answer
   x = 99,069.71