Finding the Third Proportional to 61.38 and 113.91

Step by Step Solution

1. Step 1: Write the proportion equation
   61.38 : 113.91 = 113.91 : x
2. Step 2: Convert to fraction form
   61.38/113.91 = 113.91/x
3. Step 3: Cross multiply
   61.38x = 113.91 × 113.91
4. Step 4: Simplify right side
   61.38x = 12,974.63
5. Step 5: Solve for x
   x = 12,974.63/61.38
6. Step 6: Final answer
   x = 211.37