Finding the Fourth Proportional to 10,128.88, 13,977.49 and 5,653.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.88 : 13,977.49 = 5,653.39 : x
2. Step 2: Convert to fraction form
   10,128.88/13,977.49 = 5,653.39/x
3. Step 3: Cross multiply
   10,128.88x = 13,977.49 × 5,653.39
4. Step 4: Simplify right side
   10,128.88x = 79,020,173.92
5. Step 5: Solve for x
   x = 79,020,173.92/10,128.88
6. Step 6: Final answer
   x = 7,801.48