Finding the Fourth Proportional to 3,858.50, 5,787.71 and 936.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,858.50 : 5,787.71 = 936.81 : x
2. Step 2: Convert to fraction form
   3,858.50/5,787.71 = 936.81/x
3. Step 3: Cross multiply
   3,858.50x = 5,787.71 × 936.81
4. Step 4: Simplify right side
   3,858.50x = 5,421,958.01
5. Step 5: Solve for x
   x = 5,421,958.01/3,858.50
6. Step 6: Final answer
   x = 1,405.20