Finding the Fourth Proportional to 2,864.34, 3,951.32 and 1,869.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.34 : 3,951.32 = 1,869.12 : x
2. Step 2: Convert to fraction form
   2,864.34/3,951.32 = 1,869.12/x
3. Step 3: Cross multiply
   2,864.34x = 3,951.32 × 1,869.12
4. Step 4: Simplify right side
   2,864.34x = 7,385,481.89
5. Step 5: Solve for x
   x = 7,385,481.89/2,864.34
6. Step 6: Final answer
   x = 2,578.42