Finding the Fourth Proportional to 78.83, 118.25 and 21.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78.83 : 118.25 = 21.83 : x
2. Step 2: Convert to fraction form
   78.83/118.25 = 21.83/x
3. Step 3: Cross multiply
   78.83x = 118.25 × 21.83
4. Step 4: Simplify right side
   78.83x = 2,581.29
5. Step 5: Solve for x
   x = 2,581.29/78.83
6. Step 6: Final answer
   x = 32.75