Finding the Fourth Proportional to 10,791.56, 16,159.79 and 8,603.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,791.56 : 16,159.79 = 8,603.48 : x
2. Step 2: Convert to fraction form
   10,791.56/16,159.79 = 8,603.48/x
3. Step 3: Cross multiply
   10,791.56x = 16,159.79 × 8,603.48
4. Step 4: Simplify right side
   10,791.56x = 139,030,306.25
5. Step 5: Solve for x
   x = 139,030,306.25/10,791.56
6. Step 6: Final answer
   x = 12,883.25