Finding the Third Proportional to 65,724 and 143,190

Step by Step Solution

1. Step 1: Write the proportion equation
   65,724 : 143,190 = 143,190 : x
2. Step 2: Convert to fraction form
   65,724/143,190 = 143,190/x
3. Step 3: Cross multiply
   65,724x = 143,190 × 143,190
4. Step 4: Simplify right side
   65,724x = 20,503,376,100
5. Step 5: Solve for x
   x = 20,503,376,100/65,724
6. Step 6: Final answer
   x = 311,961.78