Finding the Fourth Proportional to 69.86, 104.69 and 48.15

Step by Step Solution

1. Step 1: Write the proportion equation
   69.86 : 104.69 = 48.15 : x
2. Step 2: Convert to fraction form
   69.86/104.69 = 48.15/x
3. Step 3: Cross multiply
   69.86x = 104.69 × 48.15
4. Step 4: Simplify right side
   69.86x = 5,040.94
5. Step 5: Solve for x
   x = 5,040.94/69.86
6. Step 6: Final answer
   x = 72.16