Finding the Fourth Proportional to 12,359.90, 17,057.85 and 7,055.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,359.90 : 17,057.85 = 7,055.12 : x
2. Step 2: Convert to fraction form
   12,359.90/17,057.85 = 7,055.12/x
3. Step 3: Cross multiply
   12,359.90x = 17,057.85 × 7,055.12
4. Step 4: Simplify right side
   12,359.90x = 120,345,178.69
5. Step 5: Solve for x
   x = 120,345,178.69/12,359.90
6. Step 6: Final answer
   x = 9,736.74