Finding the Fourth Proportional to 2,099.47, 2,896.68 and 1,215.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.47 : 2,896.68 = 1,215.22 : x
2. Step 2: Convert to fraction form
   2,099.47/2,896.68 = 1,215.22/x
3. Step 3: Cross multiply
   2,099.47x = 2,896.68 × 1,215.22
4. Step 4: Simplify right side
   2,099.47x = 3,520,103.47
5. Step 5: Solve for x
   x = 3,520,103.47/2,099.47
6. Step 6: Final answer
   x = 1,676.66