Finding the Fourth Proportional to 12,815.99, 17,659.82 and 9,453.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,815.99 : 17,659.82 = 9,453.48 : x
2. Step 2: Convert to fraction form
   12,815.99/17,659.82 = 9,453.48/x
3. Step 3: Cross multiply
   12,815.99x = 17,659.82 × 9,453.48
4. Step 4: Simplify right side
   12,815.99x = 166,946,619.61
5. Step 5: Solve for x
   x = 166,946,619.61/12,815.99
6. Step 6: Final answer
   x = 13,026.43