Finding the Fourth Proportional to 152.56, 210.42 and 105.94

Step by Step Solution

1. Step 1: Write the proportion equation
   152.56 : 210.42 = 105.94 : x
2. Step 2: Convert to fraction form
   152.56/210.42 = 105.94/x
3. Step 3: Cross multiply
   152.56x = 210.42 × 105.94
4. Step 4: Simplify right side
   152.56x = 22,291.89
5. Step 5: Solve for x
   x = 22,291.89/152.56
6. Step 6: Final answer
   x = 146.12