Finding the Third Proportional to 143,855 and 215,784.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,855 : 215,784.50 = 215,784.50 : x
2. Step 2: Convert to fraction form
   143,855/215,784.50 = 215,784.50/x
3. Step 3: Cross multiply
   143,855x = 215,784.50 × 215,784.50
4. Step 4: Simplify right side
   143,855x = 46,562,950,440.25
5. Step 5: Solve for x
   x = 46,562,950,440.25/143,855
6. Step 6: Final answer
   x = 323,679.75