Finding the Fourth Proportional to 12,768.48, 17,620.20 and 7,026.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,768.48 : 17,620.20 = 7,026.12 : x
2. Step 2: Convert to fraction form
   12,768.48/17,620.20 = 7,026.12/x
3. Step 3: Cross multiply
   12,768.48x = 17,620.20 × 7,026.12
4. Step 4: Simplify right side
   12,768.48x = 123,801,639.62
5. Step 5: Solve for x
   x = 123,801,639.62/12,768.48
6. Step 6: Final answer
   x = 9,695.88