Finding the Fourth Proportional to 7,128.32, 9,837.69 and 4,144.35

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.32 : 9,837.69 = 4,144.35 : x
2. Step 2: Convert to fraction form
   7,128.32/9,837.69 = 4,144.35/x
3. Step 3: Cross multiply
   7,128.32x = 9,837.69 × 4,144.35
4. Step 4: Simplify right side
   7,128.32x = 40,770,796.56
5. Step 5: Solve for x
   x = 40,770,796.56/7,128.32
6. Step 6: Final answer
   x = 5,719.55