Finding the Third Proportional to 65,820 and 142,148

Step by Step Solution

1. Step 1: Write the proportion equation
   65,820 : 142,148 = 142,148 : x
2. Step 2: Convert to fraction form
   65,820/142,148 = 142,148/x
3. Step 3: Cross multiply
   65,820x = 142,148 × 142,148
4. Step 4: Simplify right side
   65,820x = 20,206,053,904
5. Step 5: Solve for x
   x = 20,206,053,904/65,820
6. Step 6: Final answer
   x = 306,989.58