Finding the Third Proportional to 65,472 and 143,688

Step by Step Solution

1. Step 1: Write the proportion equation
   65,472 : 143,688 = 143,688 : x
2. Step 2: Convert to fraction form
   65,472/143,688 = 143,688/x
3. Step 3: Cross multiply
   65,472x = 143,688 × 143,688
4. Step 4: Simplify right side
   65,472x = 20,646,241,344
5. Step 5: Solve for x
   x = 20,646,241,344/65,472
6. Step 6: Final answer
   x = 315,344.60