Finding the Fourth Proportional to 78.91, 108.89 and 47.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78.91 : 108.89 = 47.84 : x
2. Step 2: Convert to fraction form
   78.91/108.89 = 47.84/x
3. Step 3: Cross multiply
   78.91x = 108.89 × 47.84
4. Step 4: Simplify right side
   78.91x = 5,208.51
5. Step 5: Solve for x
   x = 5,208.51/78.91
6. Step 6: Final answer
   x = 66.01