Finding the Third Proportional to 143,867 and 217,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,867 : 217,798.50 = 217,798.50 : x
2. Step 2: Convert to fraction form
   143,867/217,798.50 = 217,798.50/x
3. Step 3: Cross multiply
   143,867x = 217,798.50 × 217,798.50
4. Step 4: Simplify right side
   143,867x = 47,436,186,602.25
5. Step 5: Solve for x
   x = 47,436,186,602.25/143,867
6. Step 6: Final answer
   x = 329,722.50