Finding the Fourth Proportional to 3,986.42, 5,501.22 and 2,218.00

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.42 : 5,501.22 = 2,218.00 : x
2. Step 2: Convert to fraction form
   3,986.42/5,501.22 = 2,218.00/x
3. Step 3: Cross multiply
   3,986.42x = 5,501.22 × 2,218.00
4. Step 4: Simplify right side
   3,986.42x = 12,201,678.45
5. Step 5: Solve for x
   x = 12,201,678.45/3,986.42
6. Step 6: Final answer
   x = 3,060.81