Finding the Fourth Proportional to 6,987.42, 9,642.39 and 3,843.60

Step by Step Solution

1. Step 1: Write the proportion equation
   6,987.42 : 9,642.39 = 3,843.60 : x
2. Step 2: Convert to fraction form
   6,987.42/9,642.39 = 3,843.60/x
3. Step 3: Cross multiply
   6,987.42x = 9,642.39 × 3,843.60
4. Step 4: Simplify right side
   6,987.42x = 37,061,490.20
5. Step 5: Solve for x
   x = 37,061,490.20/6,987.42
6. Step 6: Final answer
   x = 5,304.03