Finding the Third Proportional to 89,809 and 140,473.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,809 : 140,473.50 = 140,473.50 : x
2. Step 2: Convert to fraction form
   89,809/140,473.50 = 140,473.50/x
3. Step 3: Cross multiply
   89,809x = 140,473.50 × 140,473.50
4. Step 4: Simplify right side
   89,809x = 19,732,804,202.25
5. Step 5: Solve for x
   x = 19,732,804,202.25/89,809
6. Step 6: Final answer
   x = 219,719.67