Finding the Fourth Proportional to 10,391.78, 15,589.74 and 3,818.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,391.78 : 15,589.74 = 3,818.04 : x
2. Step 2: Convert to fraction form
   10,391.78/15,589.74 = 3,818.04/x
3. Step 3: Cross multiply
   10,391.78x = 15,589.74 × 3,818.04
4. Step 4: Simplify right side
   10,391.78x = 59,522,250.91
5. Step 5: Solve for x
   x = 59,522,250.91/10,391.78
6. Step 6: Final answer
   x = 5,727.82