Finding the Third Proportional to 90,284 and 139,726

Step by Step Solution

1. Step 1: Write the proportion equation
   90,284 : 139,726 = 139,726 : x
2. Step 2: Convert to fraction form
   90,284/139,726 = 139,726/x
3. Step 3: Cross multiply
   90,284x = 139,726 × 139,726
4. Step 4: Simplify right side
   90,284x = 19,523,355,076
5. Step 5: Solve for x
   x = 19,523,355,076/90,284
6. Step 6: Final answer
   x = 216,243.80