Finding the Fourth Proportional to 91.34, 136.83 and 69.86

Step by Step Solution

1. Step 1: Write the proportion equation
   91.34 : 136.83 = 69.86 : x
2. Step 2: Convert to fraction form
   91.34/136.83 = 69.86/x
3. Step 3: Cross multiply
   91.34x = 136.83 × 69.86
4. Step 4: Simplify right side
   91.34x = 9,558.94
5. Step 5: Solve for x
   x = 9,558.94/91.34
6. Step 6: Final answer
   x = 104.65