Finding the Fourth Proportional to 9,304.34, 14,018.57 and 8,415.89

Step by Step Solution

1. Step 1: Write the proportion equation
   9,304.34 : 14,018.57 = 8,415.89 : x
2. Step 2: Convert to fraction form
   9,304.34/14,018.57 = 8,415.89/x
3. Step 3: Cross multiply
   9,304.34x = 14,018.57 × 8,415.89
4. Step 4: Simplify right side
   9,304.34x = 117,978,630.91
5. Step 5: Solve for x
   x = 117,978,630.91/9,304.34
6. Step 6: Final answer
   x = 12,679.96