Finding the Third Proportional to 65,478 and 143,340

Step by Step Solution

1. Step 1: Write the proportion equation
   65,478 : 143,340 = 143,340 : x
2. Step 2: Convert to fraction form
   65,478/143,340 = 143,340/x
3. Step 3: Cross multiply
   65,478x = 143,340 × 143,340
4. Step 4: Simplify right side
   65,478x = 20,546,355,600
5. Step 5: Solve for x
   x = 20,546,355,600/65,478
6. Step 6: Final answer
   x = 313,790.21