Finding the Fourth Proportional to 83.98, 115.89 and 48.05

Step by Step Solution

1. Step 1: Write the proportion equation
   83.98 : 115.89 = 48.05 : x
2. Step 2: Convert to fraction form
   83.98/115.89 = 48.05/x
3. Step 3: Cross multiply
   83.98x = 115.89 × 48.05
4. Step 4: Simplify right side
   83.98x = 5,567.69
5. Step 5: Solve for x
   x = 5,567.69/83.98
6. Step 6: Final answer
   x = 66.30