Finding the Fourth Proportional to 99.79, 149.69 and 38.93

Step by Step Solution

1. Step 1: Write the proportion equation
   99.79 : 149.69 = 38.93 : x
2. Step 2: Convert to fraction form
   99.79/149.69 = 38.93/x
3. Step 3: Cross multiply
   99.79x = 149.69 × 38.93
4. Step 4: Simplify right side
   99.79x = 5,826.78
5. Step 5: Solve for x
   x = 5,826.78/99.79
6. Step 6: Final answer
   x = 58.39