Finding the Third Proportional to 90,867 and 139,180.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,867 : 139,180.50 = 139,180.50 : x
2. Step 2: Convert to fraction form
   90,867/139,180.50 = 139,180.50/x
3. Step 3: Cross multiply
   90,867x = 139,180.50 × 139,180.50
4. Step 4: Simplify right side
   90,867x = 19,371,211,580.25
5. Step 5: Solve for x
   x = 19,371,211,580.25/90,867
6. Step 6: Final answer
   x = 213,182.03