Finding the Fourth Proportional to 12,788.62, 17,642.61 and 7,481.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.62 : 17,642.61 = 7,481.09 : x
2. Step 2: Convert to fraction form
   12,788.62/17,642.61 = 7,481.09/x
3. Step 3: Cross multiply
   12,788.62x = 17,642.61 × 7,481.09
4. Step 4: Simplify right side
   12,788.62x = 131,985,997.35
5. Step 5: Solve for x
   x = 131,985,997.35/12,788.62
6. Step 6: Final answer
   x = 10,320.58