Finding the Fourth Proportional to 105.59, 158.42 and 51.46

Step by Step Solution

1. Step 1: Write the proportion equation
   105.59 : 158.42 = 51.46 : x
2. Step 2: Convert to fraction form
   105.59/158.42 = 51.46/x
3. Step 3: Cross multiply
   105.59x = 158.42 × 51.46
4. Step 4: Simplify right side
   105.59x = 8,152.29
5. Step 5: Solve for x
   x = 8,152.29/105.59
6. Step 6: Final answer
   x = 77.21