Finding the Third Proportional to 90,274 and 140,409

Step by Step Solution

1. Step 1: Write the proportion equation
   90,274 : 140,409 = 140,409 : x
2. Step 2: Convert to fraction form
   90,274/140,409 = 140,409/x
3. Step 3: Cross multiply
   90,274x = 140,409 × 140,409
4. Step 4: Simplify right side
   90,274x = 19,714,687,281
5. Step 5: Solve for x
   x = 19,714,687,281/90,274
6. Step 6: Final answer
   x = 218,387.21