Finding the Fourth Proportional to 12,359.47, 17,057.30 and 7,055.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,359.47 : 17,057.30 = 7,055.09 : x
2. Step 2: Convert to fraction form
   12,359.47/17,057.30 = 7,055.09/x
3. Step 3: Cross multiply
   12,359.47x = 17,057.30 × 7,055.09
4. Step 4: Simplify right side
   12,359.47x = 120,340,687.42
5. Step 5: Solve for x
   x = 120,340,687.42/12,359.47
6. Step 6: Final answer
   x = 9,736.72