Finding the Fourth Proportional to 3,986.47, 5,501.32 and 2,218.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.47 : 5,501.32 = 2,218.03 : x
2. Step 2: Convert to fraction form
   3,986.47/5,501.32 = 2,218.03/x
3. Step 3: Cross multiply
   3,986.47x = 5,501.32 × 2,218.03
4. Step 4: Simplify right side
   3,986.47x = 12,202,081.71
5. Step 5: Solve for x
   x = 12,202,081.71/3,986.47
6. Step 6: Final answer
   x = 3,060.88