Finding the Fourth Proportional to 78.01, 116.79 and 60.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78.01 : 116.79 = 60.84 : x
2. Step 2: Convert to fraction form
   78.01/116.79 = 60.84/x
3. Step 3: Cross multiply
   78.01x = 116.79 × 60.84
4. Step 4: Simplify right side
   78.01x = 7,105.50
5. Step 5: Solve for x
   x = 7,105.50/78.01
6. Step 6: Final answer
   x = 91.08