Finding the Fourth Proportional to 42.69, 63.93 and 19.83

Step by Step Solution

1. Step 1: Write the proportion equation
   42.69 : 63.93 = 19.83 : x
2. Step 2: Convert to fraction form
   42.69/63.93 = 19.83/x
3. Step 3: Cross multiply
   42.69x = 63.93 × 19.83
4. Step 4: Simplify right side
   42.69x = 1,267.73
5. Step 5: Solve for x
   x = 1,267.73/42.69
6. Step 6: Final answer
   x = 29.70