Finding the Fourth Proportional to 7,131.23, 9,841.56 and 3,987.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.23 : 9,841.56 = 3,987.42 : x
2. Step 2: Convert to fraction form
   7,131.23/9,841.56 = 3,987.42/x
3. Step 3: Cross multiply
   7,131.23x = 9,841.56 × 3,987.42
4. Step 4: Simplify right side
   7,131.23x = 39,242,447.89
5. Step 5: Solve for x
   x = 39,242,447.89/7,131.23
6. Step 6: Final answer
   x = 5,502.90