Finding the Fourth Proportional to 2,101.10, 2,899.28 and 1,216.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.10 : 2,899.28 = 1,216.73 : x
2. Step 2: Convert to fraction form
   2,101.10/2,899.28 = 1,216.73/x
3. Step 3: Cross multiply
   2,101.10x = 2,899.28 × 1,216.73
4. Step 4: Simplify right side
   2,101.10x = 3,527,620.37
5. Step 5: Solve for x
   x = 3,527,620.37/2,101.10
6. Step 6: Final answer
   x = 1,678.94