Finding the Third Proportional to 89,766.75 and 139,186.63

Step by Step Solution

1. Step 1: Write the proportion equation
   89,766.75 : 139,186.63 = 139,186.63 : x
2. Step 2: Convert to fraction form
   89,766.75/139,186.63 = 139,186.63/x
3. Step 3: Cross multiply
   89,766.75x = 139,186.63 × 139,186.63
4. Step 4: Simplify right side
   89,766.75x = 19,372,916,578.89
5. Step 5: Solve for x
   x = 19,372,916,578.89/89,766.75
6. Step 6: Final answer
   x = 215,813.95