Finding the Fourth Proportional to 6,987.57, 9,642.81 and 3,843.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,987.57 : 9,642.81 = 3,843.69 : x
2. Step 2: Convert to fraction form
   6,987.57/9,642.81 = 3,843.69/x
3. Step 3: Cross multiply
   6,987.57x = 9,642.81 × 3,843.69
4. Step 4: Simplify right side
   6,987.57x = 37,063,972.37
5. Step 5: Solve for x
   x = 37,063,972.37/6,987.57
6. Step 6: Final answer
   x = 5,304.27