Finding the Third Proportional to 143,189.50 and 282,765.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,189.50 : 282,765.50 = 282,765.50 : x
2. Step 2: Convert to fraction form
   143,189.50/282,765.50 = 282,765.50/x
3. Step 3: Cross multiply
   143,189.50x = 282,765.50 × 282,765.50
4. Step 4: Simplify right side
   143,189.50x = 79,956,327,990.25
5. Step 5: Solve for x
   x = 79,956,327,990.25/143,189.50
6. Step 6: Final answer
   x = 558,395.19