Finding the Fourth Proportional to 9,269.10, 12,788.10 and 6,435.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,269.10 : 12,788.10 = 6,435.72 : x
2. Step 2: Convert to fraction form
   9,269.10/12,788.10 = 6,435.72/x
3. Step 3: Cross multiply
   9,269.10x = 12,788.10 × 6,435.72
4. Step 4: Simplify right side
   9,269.10x = 82,300,630.93
5. Step 5: Solve for x
   x = 82,300,630.93/9,269.10
6. Step 6: Final answer
   x = 8,879.03