Finding the Fourth Proportional to 6,551.21, 9,039.27 and 3,898.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,551.21 : 9,039.27 = 3,898.10 : x
2. Step 2: Convert to fraction form
   6,551.21/9,039.27 = 3,898.10/x
3. Step 3: Cross multiply
   6,551.21x = 9,039.27 × 3,898.10
4. Step 4: Simplify right side
   6,551.21x = 35,235,978.39
5. Step 5: Solve for x
   x = 35,235,978.39/6,551.21
6. Step 6: Final answer
   x = 5,378.55