Finding the Third Proportional to 79,220 and 123,690

Step by Step Solution

1. Step 1: Write the proportion equation
   79,220 : 123,690 = 123,690 : x
2. Step 2: Convert to fraction form
   79,220/123,690 = 123,690/x
3. Step 3: Cross multiply
   79,220x = 123,690 × 123,690
4. Step 4: Simplify right side
   79,220x = 15,299,216,100
5. Step 5: Solve for x
   x = 15,299,216,100/79,220
6. Step 6: Final answer
   x = 193,123.15