Finding the Third Proportional to 65,810 and 143,300

Step by Step Solution

1. Step 1: Write the proportion equation
   65,810 : 143,300 = 143,300 : x
2. Step 2: Convert to fraction form
   65,810/143,300 = 143,300/x
3. Step 3: Cross multiply
   65,810x = 143,300 × 143,300
4. Step 4: Simplify right side
   65,810x = 20,534,890,000
5. Step 5: Solve for x
   x = 20,534,890,000/65,810
6. Step 6: Final answer
   x = 312,032.97