Finding the Fourth Proportional to 12,769.88, 17,617.02 and 7,799

Step by Step Solution

1. Step 1: Write the proportion equation
   12,769.88 : 17,617.02 = 7,799 : x
2. Step 2: Convert to fraction form
   12,769.88/17,617.02 = 7,799/x
3. Step 3: Cross multiply
   12,769.88x = 17,617.02 × 7,799
4. Step 4: Simplify right side
   12,769.88x = 137,395,138.98
5. Step 5: Solve for x
   x = 137,395,138.98/12,769.88
6. Step 6: Final answer
   x = 10,759.31