Finding the Fourth Proportional to 12,923.69, 17,832.56 and 7,617.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,923.69 : 17,832.56 = 7,617.78 : x
2. Step 2: Convert to fraction form
   12,923.69/17,832.56 = 7,617.78/x
3. Step 3: Cross multiply
   12,923.69x = 17,832.56 × 7,617.78
4. Step 4: Simplify right side
   12,923.69x = 135,844,480.83
5. Step 5: Solve for x
   x = 135,844,480.83/12,923.69
6. Step 6: Final answer
   x = 10,511.28