Finding the Fourth Proportional to 6,141.40, 8,498.48 and 5,315.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,141.40 : 8,498.48 = 5,315.20 : x
2. Step 2: Convert to fraction form
   6,141.40/8,498.48 = 5,315.20/x
3. Step 3: Cross multiply
   6,141.40x = 8,498.48 × 5,315.20
4. Step 4: Simplify right side
   6,141.40x = 45,171,120.90
5. Step 5: Solve for x
   x = 45,171,120.90/6,141.40
6. Step 6: Final answer
   x = 7,355.18