Finding the Third Proportional to 98.39 and 215.48

Step by Step Solution

1. Step 1: Write the proportion equation
   98.39 : 215.48 = 215.48 : x
2. Step 2: Convert to fraction form
   98.39/215.48 = 215.48/x
3. Step 3: Cross multiply
   98.39x = 215.48 × 215.48
4. Step 4: Simplify right side
   98.39x = 46,433.52
5. Step 5: Solve for x
   x = 46,433.52/98.39
6. Step 6: Final answer
   x = 471.93