Finding the Fourth Proportional to 9,300.34, 12,815.39 and 8,644.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,300.34 : 12,815.39 = 8,644.06 : x
2. Step 2: Convert to fraction form
   9,300.34/12,815.39 = 8,644.06/x
3. Step 3: Cross multiply
   9,300.34x = 12,815.39 × 8,644.06
4. Step 4: Simplify right side
   9,300.34x = 110,777,000.08
5. Step 5: Solve for x
   x = 110,777,000.08/9,300.34
6. Step 6: Final answer
   x = 11,911.07