Finding the Third Proportional to 90,487 and 140,902

Step by Step Solution

1. Step 1: Write the proportion equation
   90,487 : 140,902 = 140,902 : x
2. Step 2: Convert to fraction form
   90,487/140,902 = 140,902/x
3. Step 3: Cross multiply
   90,487x = 140,902 × 140,902
4. Step 4: Simplify right side
   90,487x = 19,853,373,604
5. Step 5: Solve for x
   x = 19,853,373,604/90,487
6. Step 6: Final answer
   x = 219,405.81