Finding the Third Proportional to 65,343 and 143,139

Step by Step Solution

1. Step 1: Write the proportion equation
   65,343 : 143,139 = 143,139 : x
2. Step 2: Convert to fraction form
   65,343/143,139 = 143,139/x
3. Step 3: Cross multiply
   65,343x = 143,139 × 143,139
4. Step 4: Simplify right side
   65,343x = 20,488,773,321
5. Step 5: Solve for x
   x = 20,488,773,321/65,343
6. Step 6: Final answer
   x = 313,557.28