Finding the Fourth Proportional to 6,138.28, 8,470.71 and 3,620.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,138.28 : 8,470.71 = 3,620.50 : x
2. Step 2: Convert to fraction form
   6,138.28/8,470.71 = 3,620.50/x
3. Step 3: Cross multiply
   6,138.28x = 8,470.71 × 3,620.50
4. Step 4: Simplify right side
   6,138.28x = 30,668,184.38
5. Step 5: Solve for x
   x = 30,668,184.38/6,138.28
6. Step 6: Final answer
   x = 4,996.22