Finding the Fourth Proportional to 3,936.50, 5,905.71 and 1,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.50 : 5,905.71 = 1,200.50 : x
2. Step 2: Convert to fraction form
   3,936.50/5,905.71 = 1,200.50/x
3. Step 3: Cross multiply
   3,936.50x = 5,905.71 × 1,200.50
4. Step 4: Simplify right side
   3,936.50x = 7,089,804.86
5. Step 5: Solve for x
   x = 7,089,804.86/3,936.50
6. Step 6: Final answer
   x = 1,801.04