Finding the Third Proportional to 142,216 and 329,240

Step by Step Solution

1. Step 1: Write the proportion equation
   142,216 : 329,240 = 329,240 : x
2. Step 2: Convert to fraction form
   142,216/329,240 = 329,240/x
3. Step 3: Cross multiply
   142,216x = 329,240 × 329,240
4. Step 4: Simplify right side
   142,216x = 108,398,977,600
5. Step 5: Solve for x
   x = 108,398,977,600/142,216
6. Step 6: Final answer
   x = 762,213.66