Finding the Fourth Proportional to 99.71, 149.54 and 38.83

Step by Step Solution

1. Step 1: Write the proportion equation
   99.71 : 149.54 = 38.83 : x
2. Step 2: Convert to fraction form
   99.71/149.54 = 38.83/x
3. Step 3: Cross multiply
   99.71x = 149.54 × 38.83
4. Step 4: Simplify right side
   99.71x = 5,806.07
5. Step 5: Solve for x
   x = 5,806.07/99.71
6. Step 6: Final answer
   x = 58.23