Finding the Third Proportional to 65,518.50 and 142,161

Step by Step Solution

1. Step 1: Write the proportion equation
   65,518.50 : 142,161 = 142,161 : x
2. Step 2: Convert to fraction form
   65,518.50/142,161 = 142,161/x
3. Step 3: Cross multiply
   65,518.50x = 142,161 × 142,161
4. Step 4: Simplify right side
   65,518.50x = 20,209,749,921
5. Step 5: Solve for x
   x = 20,209,749,921/65,518.50
6. Step 6: Final answer
   x = 308,458.68