Finding the Fourth Proportional to 12,788.82, 17,648.61 and 7,412.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.82 : 17,648.61 = 7,412.30 : x
2. Step 2: Convert to fraction form
   12,788.82/17,648.61 = 7,412.30/x
3. Step 3: Cross multiply
   12,788.82x = 17,648.61 × 7,412.30
4. Step 4: Simplify right side
   12,788.82x = 130,816,791.90
5. Step 5: Solve for x
   x = 130,816,791.90/12,788.82
6. Step 6: Final answer
   x = 10,229.00