Finding the Third Proportional to 65,578.50 and 142,173

Step by Step Solution

1. Step 1: Write the proportion equation
   65,578.50 : 142,173 = 142,173 : x
2. Step 2: Convert to fraction form
   65,578.50/142,173 = 142,173/x
3. Step 3: Cross multiply
   65,578.50x = 142,173 × 142,173
4. Step 4: Simplify right side
   65,578.50x = 20,213,161,929
5. Step 5: Solve for x
   x = 20,213,161,929/65,578.50
6. Step 6: Final answer
   x = 308,228.49