Finding the Fourth Proportional to 12,768.95, 17,620.90 and 7,103.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,768.95 : 17,620.90 = 7,103.59 : x
2. Step 2: Convert to fraction form
   12,768.95/17,620.90 = 7,103.59/x
3. Step 3: Cross multiply
   12,768.95x = 17,620.90 × 7,103.59
4. Step 4: Simplify right side
   12,768.95x = 125,171,587.22
5. Step 5: Solve for x
   x = 125,171,587.22/12,768.95
6. Step 6: Final answer
   x = 9,802.81