Finding the Fourth Proportional to 2,100.09, 2,898.27 and 1,216.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.09 : 2,898.27 = 1,216.11 : x
2. Step 2: Convert to fraction form
   2,100.09/2,898.27 = 1,216.11/x
3. Step 3: Cross multiply
   2,100.09x = 2,898.27 × 1,216.11
4. Step 4: Simplify right side
   2,100.09x = 3,524,615.13
5. Step 5: Solve for x
   x = 3,524,615.13/2,100.09
6. Step 6: Final answer
   x = 1,678.32