Finding the Fourth Proportional to 91.19, 136.59 and 73.76

Step by Step Solution

1. Step 1: Write the proportion equation
   91.19 : 136.59 = 73.76 : x
2. Step 2: Convert to fraction form
   91.19/136.59 = 73.76/x
3. Step 3: Cross multiply
   91.19x = 136.59 × 73.76
4. Step 4: Simplify right side
   91.19x = 10,075.89
5. Step 5: Solve for x
   x = 10,075.89/91.19
6. Step 6: Final answer
   x = 110.49