Finding the Fourth Proportional to 7,128.54, 9,835.83 and 4,776.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.54 : 9,835.83 = 4,776.30 : x
2. Step 2: Convert to fraction form
   7,128.54/9,835.83 = 4,776.30/x
3. Step 3: Cross multiply
   7,128.54x = 9,835.83 × 4,776.30
4. Step 4: Simplify right side
   7,128.54x = 46,978,874.83
5. Step 5: Solve for x
   x = 46,978,874.83/7,128.54
6. Step 6: Final answer
   x = 6,590.25