Finding the Fourth Proportional to 99.72, 149.57 and 38.84

Step by Step Solution

1. Step 1: Write the proportion equation
   99.72 : 149.57 = 38.84 : x
2. Step 2: Convert to fraction form
   99.72/149.57 = 38.84/x
3. Step 3: Cross multiply
   99.72x = 149.57 × 38.84
4. Step 4: Simplify right side
   99.72x = 5,809.30
5. Step 5: Solve for x
   x = 5,809.30/99.72
6. Step 6: Final answer
   x = 58.26