Finding the Fourth Proportional to 10,128.78, 13,974.44 and 5,651.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.78 : 13,974.44 = 5,651.82 : x
2. Step 2: Convert to fraction form
   10,128.78/13,974.44 = 5,651.82/x
3. Step 3: Cross multiply
   10,128.78x = 13,974.44 × 5,651.82
4. Step 4: Simplify right side
   10,128.78x = 78,980,991.22
5. Step 5: Solve for x
   x = 78,980,991.22/10,128.78
6. Step 6: Final answer
   x = 7,797.68