Finding the Third Proportional to 90,124 and 140,280

Step by Step Solution

1. Step 1: Write the proportion equation
   90,124 : 140,280 = 140,280 : x
2. Step 2: Convert to fraction form
   90,124/140,280 = 140,280/x
3. Step 3: Cross multiply
   90,124x = 140,280 × 140,280
4. Step 4: Simplify right side
   90,124x = 19,678,478,400
5. Step 5: Solve for x
   x = 19,678,478,400/90,124
6. Step 6: Final answer
   x = 218,348.92