Finding the Fourth Proportional to 6,816.69, 9,407.03 and 3,986.01

Step by Step Solution

1. Step 1: Write the proportion equation
   6,816.69 : 9,407.03 = 3,986.01 : x
2. Step 2: Convert to fraction form
   6,816.69/9,407.03 = 3,986.01/x
3. Step 3: Cross multiply
   6,816.69x = 9,407.03 × 3,986.01
4. Step 4: Simplify right side
   6,816.69x = 37,496,495.72
5. Step 5: Solve for x
   x = 37,496,495.72/6,816.69
6. Step 6: Final answer
   x = 5,500.69