Finding the Fourth Proportional to 8,112.75, 12,150.49 and 5,150.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,112.75 : 12,150.49 = 5,150.98 : x
2. Step 2: Convert to fraction form
   8,112.75/12,150.49 = 5,150.98/x
3. Step 3: Cross multiply
   8,112.75x = 12,150.49 × 5,150.98
4. Step 4: Simplify right side
   8,112.75x = 62,586,930.98
5. Step 5: Solve for x
   x = 62,586,930.98/8,112.75
6. Step 6: Final answer
   x = 7,714.64