Finding the Third Proportional to 65,603.25 and 143,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,603.25 : 143,815.50 = 143,815.50 : x
2. Step 2: Convert to fraction form
   65,603.25/143,815.50 = 143,815.50/x
3. Step 3: Cross multiply
   65,603.25x = 143,815.50 × 143,815.50
4. Step 4: Simplify right side
   65,603.25x = 20,682,898,040.25
5. Step 5: Solve for x
   x = 20,682,898,040.25/65,603.25
6. Step 6: Final answer
   x = 315,272.46