Finding the Fourth Proportional to 99.86, 149.72 and 38.14

Step by Step Solution

1. Step 1: Write the proportion equation
   99.86 : 149.72 = 38.14 : x
2. Step 2: Convert to fraction form
   99.86/149.72 = 38.14/x
3. Step 3: Cross multiply
   99.86x = 149.72 × 38.14
4. Step 4: Simplify right side
   99.86x = 5,709.76
5. Step 5: Solve for x
   x = 5,709.76/99.86
6. Step 6: Final answer
   x = 57.18