Finding the Third Proportional to 19.56 and 42.91

Step by Step Solution

1. Step 1: Write the proportion equation
   19.56 : 42.91 = 42.91 : x
2. Step 2: Convert to fraction form
   19.56/42.91 = 42.91/x
3. Step 3: Cross multiply
   19.56x = 42.91 × 42.91
4. Step 4: Simplify right side
   19.56x = 1,840.95
5. Step 5: Solve for x
   x = 1,840.95/19.56
6. Step 6: Final answer
   x = 94.11