Finding the Fourth Proportional to 90,768.42, 135,540.72 and 74,161.26

Step by Step Solution

1. Step 1: Write the proportion equation
   90,768.42 : 135,540.72 = 74,161.26 : x
2. Step 2: Convert to fraction form
   90,768.42/135,540.72 = 74,161.26/x
3. Step 3: Cross multiply
   90,768.42x = 135,540.72 × 74,161.26
4. Step 4: Simplify right side
   90,768.42x = 10,051,870,576.51
5. Step 5: Solve for x
   x = 10,051,870,576.51/90,768.42
6. Step 6: Final answer
   x = 110,741.94