Finding the Third Proportional to 65,631.38 and 143,141.25

Step by Step Solution

1. Step 1: Write the proportion equation
   65,631.38 : 143,141.25 = 143,141.25 : x
2. Step 2: Convert to fraction form
   65,631.38/143,141.25 = 143,141.25/x
3. Step 3: Cross multiply
   65,631.38x = 143,141.25 × 143,141.25
4. Step 4: Simplify right side
   65,631.38x = 20,489,417,451.56
5. Step 5: Solve for x
   x = 20,489,417,451.56/65,631.38
6. Step 6: Final answer
   x = 312,189.37