Finding the Third Proportional to 98,958.50 and 215,678

Step by Step Solution

1. Step 1: Write the proportion equation
   98,958.50 : 215,678 = 215,678 : x
2. Step 2: Convert to fraction form
   98,958.50/215,678 = 215,678/x
3. Step 3: Cross multiply
   98,958.50x = 215,678 × 215,678
4. Step 4: Simplify right side
   98,958.50x = 46,516,999,684
5. Step 5: Solve for x
   x = 46,516,999,684/98,958.50
6. Step 6: Final answer
   x = 470,065.73