Finding the Fourth Proportional to 6,987.25, 9,642.61 and 3,843.64

Step by Step Solution

1. Step 1: Write the proportion equation
   6,987.25 : 9,642.61 = 3,843.64 : x
2. Step 2: Convert to fraction form
   6,987.25/9,642.61 = 3,843.64/x
3. Step 3: Cross multiply
   6,987.25x = 9,642.61 × 3,843.64
4. Step 4: Simplify right side
   6,987.25x = 37,062,721.50
5. Step 5: Solve for x
   x = 37,062,721.50/6,987.25
6. Step 6: Final answer
   x = 5,304.34