Finding the Fourth Proportional to 9,321.10, 12,863.01 and 6,941.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,321.10 : 12,863.01 = 6,941.72 : x
2. Step 2: Convert to fraction form
   9,321.10/12,863.01 = 6,941.72/x
3. Step 3: Cross multiply
   9,321.10x = 12,863.01 × 6,941.72
4. Step 4: Simplify right side
   9,321.10x = 89,291,413.78
5. Step 5: Solve for x
   x = 89,291,413.78/9,321.10
6. Step 6: Final answer
   x = 9,579.49