Finding the Fourth Proportional to 99.12, 136.83 and 74.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99.12 : 136.83 = 74.52 : x
2. Step 2: Convert to fraction form
   99.12/136.83 = 74.52/x
3. Step 3: Cross multiply
   99.12x = 136.83 × 74.52
4. Step 4: Simplify right side
   99.12x = 10,196.57
5. Step 5: Solve for x
   x = 10,196.57/99.12
6. Step 6: Final answer
   x = 102.87