Finding the Fourth Proportional to 69.86, 104.86 and 48.50

Step by Step Solution

1. Step 1: Write the proportion equation
   69.86 : 104.86 = 48.50 : x
2. Step 2: Convert to fraction form
   69.86/104.86 = 48.50/x
3. Step 3: Cross multiply
   69.86x = 104.86 × 48.50
4. Step 4: Simplify right side
   69.86x = 5,085.71
5. Step 5: Solve for x
   x = 5,085.71/69.86
6. Step 6: Final answer
   x = 72.80