Finding the Fourth Proportional to 9,389.09, 14,071.83 and 8,216.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,389.09 : 14,071.83 = 8,216.30 : x
2. Step 2: Convert to fraction form
   9,389.09/14,071.83 = 8,216.30/x
3. Step 3: Cross multiply
   9,389.09x = 14,071.83 × 8,216.30
4. Step 4: Simplify right side
   9,389.09x = 115,618,306.47
5. Step 5: Solve for x
   x = 115,618,306.47/9,389.09
6. Step 6: Final answer
   x = 12,314.12