Finding the Fourth Proportional to 7,815.69, 10,785.89 and 4,279.14

Step by Step Solution

1. Step 1: Write the proportion equation
   7,815.69 : 10,785.89 = 4,279.14 : x
2. Step 2: Convert to fraction form
   7,815.69/10,785.89 = 4,279.14/x
3. Step 3: Cross multiply
   7,815.69x = 10,785.89 × 4,279.14
4. Step 4: Simplify right side
   7,815.69x = 46,154,333.33
5. Step 5: Solve for x
   x = 46,154,333.33/7,815.69
6. Step 6: Final answer
   x = 5,905.34