Finding the Third Proportional to 143,928 and 212,004

Step by Step Solution

1. Step 1: Write the proportion equation
   143,928 : 212,004 = 212,004 : x
2. Step 2: Convert to fraction form
   143,928/212,004 = 212,004/x
3. Step 3: Cross multiply
   143,928x = 212,004 × 212,004
4. Step 4: Simplify right side
   143,928x = 44,945,696,016
5. Step 5: Solve for x
   x = 44,945,696,016/143,928
6. Step 6: Final answer
   x = 312,279.03