Finding the Fourth Proportional to 12,468.58, 17,205.30 and 7,687.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,468.58 : 17,205.30 = 7,687.72 : x
2. Step 2: Convert to fraction form
   12,468.58/17,205.30 = 7,687.72/x
3. Step 3: Cross multiply
   12,468.58x = 17,205.30 × 7,687.72
4. Step 4: Simplify right side
   12,468.58x = 132,269,528.92
5. Step 5: Solve for x
   x = 132,269,528.92/12,468.58
6. Step 6: Final answer
   x = 10,608.23