Finding the Fourth Proportional to 2,111.14, 2,913.58 and 1,215.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.14 : 2,913.58 = 1,215.02 : x
2. Step 2: Convert to fraction form
   2,111.14/2,913.58 = 1,215.02/x
3. Step 3: Cross multiply
   2,111.14x = 2,913.58 × 1,215.02
4. Step 4: Simplify right side
   2,111.14x = 3,540,057.97
5. Step 5: Solve for x
   x = 3,540,057.97/2,111.14
6. Step 6: Final answer
   x = 1,676.85