Finding the Fourth Proportional to 99.34, 136.83 and 75.80

Step by Step Solution

1. Step 1: Write the proportion equation
   99.34 : 136.83 = 75.80 : x
2. Step 2: Convert to fraction form
   99.34/136.83 = 75.80/x
3. Step 3: Cross multiply
   99.34x = 136.83 × 75.80
4. Step 4: Simplify right side
   99.34x = 10,371.71
5. Step 5: Solve for x
   x = 10,371.71/99.34
6. Step 6: Final answer
   x = 104.41