Finding the Fourth Proportional to 6,987.18, 9,642.15 and 3,843.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,987.18 : 9,642.15 = 3,843.42 : x
2. Step 2: Convert to fraction form
   6,987.18/9,642.15 = 3,843.42/x
3. Step 3: Cross multiply
   6,987.18x = 9,642.15 × 3,843.42
4. Step 4: Simplify right side
   6,987.18x = 37,058,832.15
5. Step 5: Solve for x
   x = 37,058,832.15/6,987.18
6. Step 6: Final answer
   x = 5,303.83