Finding the Third Proportional to 99.38 and 215.63

Step by Step Solution

1. Step 1: Write the proportion equation
   99.38 : 215.63 = 215.63 : x
2. Step 2: Convert to fraction form
   99.38/215.63 = 215.63/x
3. Step 3: Cross multiply
   99.38x = 215.63 × 215.63
4. Step 4: Simplify right side
   99.38x = 46,494.14
5. Step 5: Solve for x
   x = 46,494.14/99.38
6. Step 6: Final answer
   x = 467.87