Finding the Fourth Proportional to 113.31, 156.42 and 69.05

Step by Step Solution

1. Step 1: Write the proportion equation
   113.31 : 156.42 = 69.05 : x
2. Step 2: Convert to fraction form
   113.31/156.42 = 69.05/x
3. Step 3: Cross multiply
   113.31x = 156.42 × 69.05
4. Step 4: Simplify right side
   113.31x = 10,801.09
5. Step 5: Solve for x
   x = 10,801.09/113.31
6. Step 6: Final answer
   x = 95.32