Finding the Fourth Proportional to 10,415.43, 15,603.51 and 5,144.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,415.43 : 15,603.51 = 5,144.27 : x
2. Step 2: Convert to fraction form
   10,415.43/15,603.51 = 5,144.27/x
3. Step 3: Cross multiply
   10,415.43x = 15,603.51 × 5,144.27
4. Step 4: Simplify right side
   10,415.43x = 80,268,590.37
5. Step 5: Solve for x
   x = 80,268,590.37/10,415.43
6. Step 6: Final answer
   x = 7,706.70