Finding the Third Proportional to 86,601.50 and 137,906.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,601.50 : 137,906.50 = 137,906.50 : x
2. Step 2: Convert to fraction form
   86,601.50/137,906.50 = 137,906.50/x
3. Step 3: Cross multiply
   86,601.50x = 137,906.50 × 137,906.50
4. Step 4: Simplify right side
   86,601.50x = 19,018,202,742.25
5. Step 5: Solve for x
   x = 19,018,202,742.25/86,601.50
6. Step 6: Final answer
   x = 219,605.93