Finding the Fourth Proportional to 10,667.15, 15,993.87 and 4,431.47

Step by Step Solution

1. Step 1: Write the proportion equation
   10,667.15 : 15,993.87 = 4,431.47 : x
2. Step 2: Convert to fraction form
   10,667.15/15,993.87 = 4,431.47/x
3. Step 3: Cross multiply
   10,667.15x = 15,993.87 × 4,431.47
4. Step 4: Simplify right side
   10,667.15x = 70,876,275.12
5. Step 5: Solve for x
   x = 70,876,275.12/10,667.15
6. Step 6: Final answer
   x = 6,644.35