Finding the Fourth Proportional to 19.91, 29.69 and 19.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19.91 : 29.69 = 19.50 : x
2. Step 2: Convert to fraction form
   19.91/29.69 = 19.50/x
3. Step 3: Cross multiply
   19.91x = 29.69 × 19.50
4. Step 4: Simplify right side
   19.91x = 578.86
5. Step 5: Solve for x
   x = 578.86/19.91
6. Step 6: Final answer
   x = 29.08