Finding the Third Proportional to 143,203 and 282,790.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,203 : 282,790.50 = 282,790.50 : x
2. Step 2: Convert to fraction form
   143,203/282,790.50 = 282,790.50/x
3. Step 3: Cross multiply
   143,203x = 282,790.50 × 282,790.50
4. Step 4: Simplify right side
   143,203x = 79,970,466,890.25
5. Step 5: Solve for x
   x = 79,970,466,890.25/143,203
6. Step 6: Final answer
   x = 558,441.28