Finding the Fourth Proportional to 114.95, 158.56 and 78.10

Step by Step Solution

1. Step 1: Write the proportion equation
   114.95 : 158.56 = 78.10 : x
2. Step 2: Convert to fraction form
   114.95/158.56 = 78.10/x
3. Step 3: Cross multiply
   114.95x = 158.56 × 78.10
4. Step 4: Simplify right side
   114.95x = 12,382.94
5. Step 5: Solve for x
   x = 12,382.94/114.95
6. Step 6: Final answer
   x = 107.72