Finding the Fourth Proportional to 9,108.50, 12,567.57 and 5,128.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,108.50 : 12,567.57 = 5,128.82 : x
2. Step 2: Convert to fraction form
   9,108.50/12,567.57 = 5,128.82/x
3. Step 3: Cross multiply
   9,108.50x = 12,567.57 × 5,128.82
4. Step 4: Simplify right side
   9,108.50x = 64,456,804.37
5. Step 5: Solve for x
   x = 64,456,804.37/9,108.50
6. Step 6: Final answer
   x = 7,076.56