Finding the Third Proportional to 91.83 and 211.15

Step by Step Solution

1. Step 1: Write the proportion equation
   91.83 : 211.15 = 211.15 : x
2. Step 2: Convert to fraction form
   91.83/211.15 = 211.15/x
3. Step 3: Cross multiply
   91.83x = 211.15 × 211.15
4. Step 4: Simplify right side
   91.83x = 44,583.66
5. Step 5: Solve for x
   x = 44,583.66/91.83
6. Step 6: Final answer
   x = 485.51