Finding the Third Proportional to 71,688 and 100,287

Step by Step Solution

1. Step 1: Write the proportion equation
   71,688 : 100,287 = 100,287 : x
2. Step 2: Convert to fraction form
   71,688/100,287 = 100,287/x
3. Step 3: Cross multiply
   71,688x = 100,287 × 100,287
4. Step 4: Simplify right side
   71,688x = 10,057,482,369
5. Step 5: Solve for x
   x = 10,057,482,369/71,688
6. Step 6: Final answer
   x = 140,295.20