Finding the Third Proportional to 142,955 and 210,274

Step by Step Solution

1. Step 1: Write the proportion equation
   142,955 : 210,274 = 210,274 : x
2. Step 2: Convert to fraction form
   142,955/210,274 = 210,274/x
3. Step 3: Cross multiply
   142,955x = 210,274 × 210,274
4. Step 4: Simplify right side
   142,955x = 44,215,155,076
5. Step 5: Solve for x
   x = 44,215,155,076/142,955
6. Step 6: Final answer
   x = 309,294.22