Finding the Third Proportional to 142,056 and 215,676

Step by Step Solution

1. Step 1: Write the proportion equation
   142,056 : 215,676 = 215,676 : x
2. Step 2: Convert to fraction form
   142,056/215,676 = 215,676/x
3. Step 3: Cross multiply
   142,056x = 215,676 × 215,676
4. Step 4: Simplify right side
   142,056x = 46,516,136,976
5. Step 5: Solve for x
   x = 46,516,136,976/142,056
6. Step 6: Final answer
   x = 327,449.29