Finding the Fourth Proportional to 2,099.76, 2,897.01 and 1,215.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.76 : 2,897.01 = 1,215.42 : x
2. Step 2: Convert to fraction form
   2,099.76/2,897.01 = 1,215.42/x
3. Step 3: Cross multiply
   2,099.76x = 2,897.01 × 1,215.42
4. Step 4: Simplify right side
   2,099.76x = 3,521,083.89
5. Step 5: Solve for x
   x = 3,521,083.89/2,099.76
6. Step 6: Final answer
   x = 1,676.90