Finding the Fourth Proportional to 8,510.88, 12,768.72 and 4,128.48

Step by Step Solution

1. Step 1: Write the proportion equation
   8,510.88 : 12,768.72 = 4,128.48 : x
2. Step 2: Convert to fraction form
   8,510.88/12,768.72 = 4,128.48/x
3. Step 3: Cross multiply
   8,510.88x = 12,768.72 × 4,128.48
4. Step 4: Simplify right side
   8,510.88x = 52,715,405.15
5. Step 5: Solve for x
   x = 52,715,405.15/8,510.88
6. Step 6: Final answer
   x = 6,193.88