Finding the Fourth Proportional to 2,099.91, 2,898 and 1,216.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.91 : 2,898 = 1,216.02 : x
2. Step 2: Convert to fraction form
   2,099.91/2,898 = 1,216.02/x
3. Step 3: Cross multiply
   2,099.91x = 2,898 × 1,216.02
4. Step 4: Simplify right side
   2,099.91x = 3,524,025.96
5. Step 5: Solve for x
   x = 3,524,025.96/2,099.91
6. Step 6: Final answer
   x = 1,678.18