Finding the Third Proportional to 143,704 and 217,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,704 : 217,543.50 = 217,543.50 : x
2. Step 2: Convert to fraction form
   143,704/217,543.50 = 217,543.50/x
3. Step 3: Cross multiply
   143,704x = 217,543.50 × 217,543.50
4. Step 4: Simplify right side
   143,704x = 47,325,174,392.25
5. Step 5: Solve for x
   x = 47,325,174,392.25/143,704
6. Step 6: Final answer
   x = 329,323.99