Finding the Fourth Proportional to 113.50, 156.72 and 69.86

Step by Step Solution

1. Step 1: Write the proportion equation
   113.50 : 156.72 = 69.86 : x
2. Step 2: Convert to fraction form
   113.50/156.72 = 69.86/x
3. Step 3: Cross multiply
   113.50x = 156.72 × 69.86
4. Step 4: Simplify right side
   113.50x = 10,948.46
5. Step 5: Solve for x
   x = 10,948.46/113.50
6. Step 6: Final answer
   x = 96.46