Finding the Fourth Proportional to 6,681.88, 10,019.86 and 3,561.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,681.88 : 10,019.86 = 3,561.31 : x
2. Step 2: Convert to fraction form
   6,681.88/10,019.86 = 3,561.31/x
3. Step 3: Cross multiply
   6,681.88x = 10,019.86 × 3,561.31
4. Step 4: Simplify right side
   6,681.88x = 35,683,777.52
5. Step 5: Solve for x
   x = 35,683,777.52/6,681.88
6. Step 6: Final answer
   x = 5,340.38