Finding the Fourth Proportional to 6,321.05, 8,721.29 and 4,083.02

Step by Step Solution

1. Step 1: Write the proportion equation
   6,321.05 : 8,721.29 = 4,083.02 : x
2. Step 2: Convert to fraction form
   6,321.05/8,721.29 = 4,083.02/x
3. Step 3: Cross multiply
   6,321.05x = 8,721.29 × 4,083.02
4. Step 4: Simplify right side
   6,321.05x = 35,609,157.89
5. Step 5: Solve for x
   x = 35,609,157.89/6,321.05
6. Step 6: Final answer
   x = 5,633.43