Finding the Fourth Proportional to 12,817.37, 17,680.83 and 7,511.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.37 : 17,680.83 = 7,511.15 : x
2. Step 2: Convert to fraction form
   12,817.37/17,680.83 = 7,511.15/x
3. Step 3: Cross multiply
   12,817.37x = 17,680.83 × 7,511.15
4. Step 4: Simplify right side
   12,817.37x = 132,803,277.85
5. Step 5: Solve for x
   x = 132,803,277.85/12,817.37
6. Step 6: Final answer
   x = 10,361.20