Finding the Fourth Proportional to 99.63, 137.61 and 75.06

Step by Step Solution

1. Step 1: Write the proportion equation
   99.63 : 137.61 = 75.06 : x
2. Step 2: Convert to fraction form
   99.63/137.61 = 75.06/x
3. Step 3: Cross multiply
   99.63x = 137.61 × 75.06
4. Step 4: Simplify right side
   99.63x = 10,329.01
5. Step 5: Solve for x
   x = 10,329.01/99.63
6. Step 6: Final answer
   x = 103.67