Finding the Fourth Proportional to 2,100.94, 2,898.59 and 1,216.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.94 : 2,898.59 = 1,216.42 : x
2. Step 2: Convert to fraction form
   2,100.94/2,898.59 = 1,216.42/x
3. Step 3: Cross multiply
   2,100.94x = 2,898.59 × 1,216.42
4. Step 4: Simplify right side
   2,100.94x = 3,525,889.52
5. Step 5: Solve for x
   x = 3,525,889.52/2,100.94
6. Step 6: Final answer
   x = 1,678.25