Finding the Fourth Proportional to 6,275.40, 8,665.56 and 3,921.54

Step by Step Solution

1. Step 1: Write the proportion equation
   6,275.40 : 8,665.56 = 3,921.54 : x
2. Step 2: Convert to fraction form
   6,275.40/8,665.56 = 3,921.54/x
3. Step 3: Cross multiply
   6,275.40x = 8,665.56 × 3,921.54
4. Step 4: Simplify right side
   6,275.40x = 33,982,340.16
5. Step 5: Solve for x
   x = 33,982,340.16/6,275.40
6. Step 6: Final answer
   x = 5,415.17