Finding the Fourth Proportional to 6,391.61, 8,819.79 and 3,738.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,391.61 : 8,819.79 = 3,738.50 : x
2. Step 2: Convert to fraction form
   6,391.61/8,819.79 = 3,738.50/x
3. Step 3: Cross multiply
   6,391.61x = 8,819.79 × 3,738.50
4. Step 4: Simplify right side
   6,391.61x = 32,972,784.92
5. Step 5: Solve for x
   x = 32,972,784.92/6,391.61
6. Step 6: Final answer
   x = 5,158.76