Finding the Fourth Proportional to 7,131.69, 9,841.50 and 3,987.87

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.69 : 9,841.50 = 3,987.87 : x
2. Step 2: Convert to fraction form
   7,131.69/9,841.50 = 3,987.87/x
3. Step 3: Cross multiply
   7,131.69x = 9,841.50 × 3,987.87
4. Step 4: Simplify right side
   7,131.69x = 39,246,622.61
5. Step 5: Solve for x
   x = 39,246,622.61/7,131.69
6. Step 6: Final answer
   x = 5,503.13