Finding the Fourth Proportional to 3,936.25, 5,905.34 and 1,200.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.25 : 5,905.34 = 1,200.25 : x
2. Step 2: Convert to fraction form
   3,936.25/5,905.34 = 1,200.25/x
3. Step 3: Cross multiply
   3,936.25x = 5,905.34 × 1,200.25
4. Step 4: Simplify right side
   3,936.25x = 7,087,878.33
5. Step 5: Solve for x
   x = 7,087,878.33/3,936.25
6. Step 6: Final answer
   x = 1,800.67