Finding the Third Proportional to 99.14 and 215.30

Step by Step Solution

1. Step 1: Write the proportion equation
   99.14 : 215.30 = 215.30 : x
2. Step 2: Convert to fraction form
   99.14/215.30 = 215.30/x
3. Step 3: Cross multiply
   99.14x = 215.30 × 215.30
4. Step 4: Simplify right side
   99.14x = 46,352.74
5. Step 5: Solve for x
   x = 46,352.74/99.14
6. Step 6: Final answer
   x = 467.55