Finding the Fourth Proportional to 2,099.34, 2,897.15 and 1,215.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.34 : 2,897.15 = 1,215.42 : x
2. Step 2: Convert to fraction form
   2,099.34/2,897.15 = 1,215.42/x
3. Step 3: Cross multiply
   2,099.34x = 2,897.15 × 1,215.42
4. Step 4: Simplify right side
   2,099.34x = 3,521,254.05
5. Step 5: Solve for x
   x = 3,521,254.05/2,099.34
6. Step 6: Final answer
   x = 1,677.31