Finding the Fourth Proportional to 104.39, 156.63 and 69.83

Step by Step Solution

1. Step 1: Write the proportion equation
   104.39 : 156.63 = 69.83 : x
2. Step 2: Convert to fraction form
   104.39/156.63 = 69.83/x
3. Step 3: Cross multiply
   104.39x = 156.63 × 69.83
4. Step 4: Simplify right side
   104.39x = 10,936.69
5. Step 5: Solve for x
   x = 10,936.69/104.39
6. Step 6: Final answer
   x = 104.77