Finding the Fourth Proportional to 12,788.08, 17,648.09 and 7,122.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,788.08 : 17,648.09 = 7,122.83 : x
2. Step 2: Convert to fraction form
   12,788.08/17,648.09 = 7,122.83/x
3. Step 3: Cross multiply
   12,788.08x = 17,648.09 × 7,122.83
4. Step 4: Simplify right side
   12,788.08x = 125,704,274.46
5. Step 5: Solve for x
   x = 125,704,274.46/12,788.08
6. Step 6: Final answer
   x = 9,829.80