Finding the Fourth Proportional to 2,100.16, 2,898.24 and 1,216.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.16 : 2,898.24 = 1,216.12 : x
2. Step 2: Convert to fraction form
   2,100.16/2,898.24 = 1,216.12/x
3. Step 3: Cross multiply
   2,100.16x = 2,898.24 × 1,216.12
4. Step 4: Simplify right side
   2,100.16x = 3,524,607.63
5. Step 5: Solve for x
   x = 3,524,607.63/2,100.16
6. Step 6: Final answer
   x = 1,678.26