Finding the Fourth Proportional to 5,388.50, 7,433.68 and 3,894.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,388.50 : 7,433.68 = 3,894.05 : x
2. Step 2: Convert to fraction form
   5,388.50/7,433.68 = 3,894.05/x
3. Step 3: Cross multiply
   5,388.50x = 7,433.68 × 3,894.05
4. Step 4: Simplify right side
   5,388.50x = 28,947,089.30
5. Step 5: Solve for x
   x = 28,947,089.30/5,388.50
6. Step 6: Final answer
   x = 5,372.02