Finding the Fourth Proportional to 7,815.89, 10,785.96 and 4,279.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,815.89 : 10,785.96 = 4,279.10 : x
2. Step 2: Convert to fraction form
   7,815.89/10,785.96 = 4,279.10/x
3. Step 3: Cross multiply
   7,815.89x = 10,785.96 × 4,279.10
4. Step 4: Simplify right side
   7,815.89x = 46,154,147.51
5. Step 5: Solve for x
   x = 46,154,147.51/7,815.89
6. Step 6: Final answer
   x = 5,905.17