Finding the Fourth Proportional to 6,406.05, 8,845.91 and 4,020.16

Step by Step Solution

1. Step 1: Write the proportion equation
   6,406.05 : 8,845.91 = 4,020.16 : x
2. Step 2: Convert to fraction form
   6,406.05/8,845.91 = 4,020.16/x
3. Step 3: Cross multiply
   6,406.05x = 8,845.91 × 4,020.16
4. Step 4: Simplify right side
   6,406.05x = 35,561,983.60
5. Step 5: Solve for x
   x = 35,561,983.60/6,406.05
6. Step 6: Final answer
   x = 5,551.31