Finding the Fourth Proportional to 113.49, 156.69 and 69.89

Step by Step Solution

1. Step 1: Write the proportion equation
   113.49 : 156.69 = 69.89 : x
2. Step 2: Convert to fraction form
   113.49/156.69 = 69.89/x
3. Step 3: Cross multiply
   113.49x = 156.69 × 69.89
4. Step 4: Simplify right side
   113.49x = 10,950.28
5. Step 5: Solve for x
   x = 10,950.28/113.49
6. Step 6: Final answer
   x = 96.49