Finding the Fourth Proportional to 2,218.01, 3,061.19 and 1,686.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218.01 : 3,061.19 = 1,686.02 : x
2. Step 2: Convert to fraction form
   2,218.01/3,061.19 = 1,686.02/x
3. Step 3: Cross multiply
   2,218.01x = 3,061.19 × 1,686.02
4. Step 4: Simplify right side
   2,218.01x = 5,161,203.83
5. Step 5: Solve for x
   x = 5,161,203.83/2,218.01
6. Step 6: Final answer
   x = 2,326.96