Finding the Third Proportional to 143,116 and 210,295

Step by Step Solution

1. Step 1: Write the proportion equation
   143,116 : 210,295 = 210,295 : x
2. Step 2: Convert to fraction form
   143,116/210,295 = 210,295/x
3. Step 3: Cross multiply
   143,116x = 210,295 × 210,295
4. Step 4: Simplify right side
   143,116x = 44,223,987,025
5. Step 5: Solve for x
   x = 44,223,987,025/143,116
6. Step 6: Final answer
   x = 309,007.99