Finding the Third Proportional to 143,022 and 210,402

Step by Step Solution

1. Step 1: Write the proportion equation
   143,022 : 210,402 = 210,402 : x
2. Step 2: Convert to fraction form
   143,022/210,402 = 210,402/x
3. Step 3: Cross multiply
   143,022x = 210,402 × 210,402
4. Step 4: Simplify right side
   143,022x = 44,269,001,604
5. Step 5: Solve for x
   x = 44,269,001,604/143,022
6. Step 6: Final answer
   x = 309,525.82