Finding the Fourth Proportional to 99.68, 149.42 and 38.82

Step by Step Solution

1. Step 1: Write the proportion equation
   99.68 : 149.42 = 38.82 : x
2. Step 2: Convert to fraction form
   99.68/149.42 = 38.82/x
3. Step 3: Cross multiply
   99.68x = 149.42 × 38.82
4. Step 4: Simplify right side
   99.68x = 5,800.48
5. Step 5: Solve for x
   x = 5,800.48/99.68
6. Step 6: Final answer
   x = 58.19