Finding the Fourth Proportional to 4,815.69, 6,645.72 and 2,691.42

Step by Step Solution

1. Step 1: Write the proportion equation
   4,815.69 : 6,645.72 = 2,691.42 : x
2. Step 2: Convert to fraction form
   4,815.69/6,645.72 = 2,691.42/x
3. Step 3: Cross multiply
   4,815.69x = 6,645.72 × 2,691.42
4. Step 4: Simplify right side
   4,815.69x = 17,886,423.72
5. Step 5: Solve for x
   x = 17,886,423.72/4,815.69
6. Step 6: Final answer
   x = 3,714.20