Finding the Fourth Proportional to 6,551.93, 9,042.42 and 3,899.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,551.93 : 9,042.42 = 3,899.31 : x
2. Step 2: Convert to fraction form
   6,551.93/9,042.42 = 3,899.31/x
3. Step 3: Cross multiply
   6,551.93x = 9,042.42 × 3,899.31
4. Step 4: Simplify right side
   6,551.93x = 35,259,198.73
5. Step 5: Solve for x
   x = 35,259,198.73/6,551.93
6. Step 6: Final answer
   x = 5,381.50