Finding the Fourth Proportional to 2,101.08, 2,898.72 and 1,216.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.08 : 2,898.72 = 1,216.56 : x
2. Step 2: Convert to fraction form
   2,101.08/2,898.72 = 1,216.56/x
3. Step 3: Cross multiply
   2,101.08x = 2,898.72 × 1,216.56
4. Step 4: Simplify right side
   2,101.08x = 3,526,466.80
5. Step 5: Solve for x
   x = 3,526,466.80/2,101.08
6. Step 6: Final answer
   x = 1,678.41