Finding the Fourth Proportional to 7,815.84, 10,785.72 and 4,279.06

Step by Step Solution

1. Step 1: Write the proportion equation
   7,815.84 : 10,785.72 = 4,279.06 : x
2. Step 2: Convert to fraction form
   7,815.84/10,785.72 = 4,279.06/x
3. Step 3: Cross multiply
   7,815.84x = 10,785.72 × 4,279.06
4. Step 4: Simplify right side
   7,815.84x = 46,152,743.02
5. Step 5: Solve for x
   x = 46,152,743.02/7,815.84
6. Step 6: Final answer
   x = 5,905.03