Finding the Fourth Proportional to 7,830.15, 10,805.55 and 4,293.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,830.15 : 10,805.55 = 4,293.30 : x
2. Step 2: Convert to fraction form
   7,830.15/10,805.55 = 4,293.30/x
3. Step 3: Cross multiply
   7,830.15x = 10,805.55 × 4,293.30
4. Step 4: Simplify right side
   7,830.15x = 46,391,467.82
5. Step 5: Solve for x
   x = 46,391,467.82/7,830.15
6. Step 6: Final answer
   x = 5,924.72