Finding the Fourth Proportional to 91.91, 137.63 and 73.69

Step by Step Solution

1. Step 1: Write the proportion equation
   91.91 : 137.63 = 73.69 : x
2. Step 2: Convert to fraction form
   91.91/137.63 = 73.69/x
3. Step 3: Cross multiply
   91.91x = 137.63 × 73.69
4. Step 4: Simplify right side
   91.91x = 10,141.79
5. Step 5: Solve for x
   x = 10,141.79/91.91
6. Step 6: Final answer
   x = 110.34