Finding the Fourth Proportional to 9,300.42, 12,826.89 and 6,311.34

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.42 : 12,826.89 = 6,311.34 : x
2. Step 2: Convert to fraction form
   9,300.42/12,826.89 = 6,311.34/x
3. Step 3: Cross multiply
   9,300.42x = 12,826.89 × 6,311.34
4. Step 4: Simplify right side
   9,300.42x = 80,954,863.93
5. Step 5: Solve for x
   x = 80,954,863.93/9,300.42
6. Step 6: Final answer
   x = 8,704.43