Finding the Third Proportional to 92,478 and 139,690

Step by Step Solution

1. Step 1: Write the proportion equation
   92,478 : 139,690 = 139,690 : x
2. Step 2: Convert to fraction form
   92,478/139,690 = 139,690/x
3. Step 3: Cross multiply
   92,478x = 139,690 × 139,690
4. Step 4: Simplify right side
   92,478x = 19,513,296,100
5. Step 5: Solve for x
   x = 19,513,296,100/92,478
6. Step 6: Final answer
   x = 211,004.74