Finding the Third Proportional to 90,416 and 140,000

Step by Step Solution

1. Step 1: Write the proportion equation
   90,416 : 140,000 = 140,000 : x
2. Step 2: Convert to fraction form
   90,416/140,000 = 140,000/x
3. Step 3: Cross multiply
   90,416x = 140,000 × 140,000
4. Step 4: Simplify right side
   90,416x = 19,600,000,000
5. Step 5: Solve for x
   x = 19,600,000,000/90,416
6. Step 6: Final answer
   x = 216,775.79