Finding the Third Proportional to 64,684 and 141,390

Step by Step Solution

1. Step 1: Write the proportion equation
   64,684 : 141,390 = 141,390 : x
2. Step 2: Convert to fraction form
   64,684/141,390 = 141,390/x
3. Step 3: Cross multiply
   64,684x = 141,390 × 141,390
4. Step 4: Simplify right side
   64,684x = 19,991,132,100
5. Step 5: Solve for x
   x = 19,991,132,100/64,684
6. Step 6: Final answer
   x = 309,058.38