Finding the Third Proportional to 89,556.75 and 139,783.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,556.75 : 139,783.50 = 139,783.50 : x
2. Step 2: Convert to fraction form
   89,556.75/139,783.50 = 139,783.50/x
3. Step 3: Cross multiply
   89,556.75x = 139,783.50 × 139,783.50
4. Step 4: Simplify right side
   89,556.75x = 19,539,426,872.25
5. Step 5: Solve for x
   x = 19,539,426,872.25/89,556.75
6. Step 6: Final answer
   x = 218,179.28