Finding the Fourth Proportional to 7,131.46, 9,841.72 and 3,987.62

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.46 : 9,841.72 = 3,987.62 : x
2. Step 2: Convert to fraction form
   7,131.46/9,841.72 = 3,987.62/x
3. Step 3: Cross multiply
   7,131.46x = 9,841.72 × 3,987.62
4. Step 4: Simplify right side
   7,131.46x = 39,245,039.51
5. Step 5: Solve for x
   x = 39,245,039.51/7,131.46
6. Step 6: Final answer
   x = 5,503.09