Finding the Third Proportional to 65,642 and 143,316

Step by Step Solution

1. Step 1: Write the proportion equation
   65,642 : 143,316 = 143,316 : x
2. Step 2: Convert to fraction form
   65,642/143,316 = 143,316/x
3. Step 3: Cross multiply
   65,642x = 143,316 × 143,316
4. Step 4: Simplify right side
   65,642x = 20,539,475,856
5. Step 5: Solve for x
   x = 20,539,475,856/65,642
6. Step 6: Final answer
   x = 312,901.43