Finding the Fourth Proportional to 9,521.61, 13,164.90 and 8,339.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,521.61 : 13,164.90 = 8,339.29 : x
2. Step 2: Convert to fraction form
   9,521.61/13,164.90 = 8,339.29/x
3. Step 3: Cross multiply
   9,521.61x = 13,164.90 × 8,339.29
4. Step 4: Simplify right side
   9,521.61x = 109,785,918.92
5. Step 5: Solve for x
   x = 109,785,918.92/9,521.61
6. Step 6: Final answer
   x = 11,530.18