Finding the Fourth Proportional to 12,769, 17,621.82 and 7,103.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,769 : 17,621.82 = 7,103.78 : x
2. Step 2: Convert to fraction form
   12,769/17,621.82 = 7,103.78/x
3. Step 3: Cross multiply
   12,769x = 17,621.82 × 7,103.78
4. Step 4: Simplify right side
   12,769x = 125,181,532.48
5. Step 5: Solve for x
   x = 125,181,532.48/12,769
6. Step 6: Final answer
   x = 9,803.55