Finding the Fourth Proportional to 116.38, 174.56 and 99.98

Step by Step Solution

1. Step 1: Write the proportion equation
   116.38 : 174.56 = 99.98 : x
2. Step 2: Convert to fraction form
   116.38/174.56 = 99.98/x
3. Step 3: Cross multiply
   116.38x = 174.56 × 99.98
4. Step 4: Simplify right side
   116.38x = 17,452.51
5. Step 5: Solve for x
   x = 17,452.51/116.38
6. Step 6: Final answer
   x = 149.96