Finding the Fourth Proportional to 105.38, 157.72 and 88.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105.38 : 157.72 = 88.06 : x
2. Step 2: Convert to fraction form
   105.38/157.72 = 88.06/x
3. Step 3: Cross multiply
   105.38x = 157.72 × 88.06
4. Step 4: Simplify right side
   105.38x = 13,888.82
5. Step 5: Solve for x
   x = 13,888.82/105.38
6. Step 6: Final answer
   x = 131.80