Finding the Fourth Proportional to 11,817.34, 16,309.73 and 8,980.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,817.34 : 16,309.73 = 8,980.09 : x
2. Step 2: Convert to fraction form
   11,817.34/16,309.73 = 8,980.09/x
3. Step 3: Cross multiply
   11,817.34x = 16,309.73 × 8,980.09
4. Step 4: Simplify right side
   11,817.34x = 146,462,843.28
5. Step 5: Solve for x
   x = 146,462,843.28/11,817.34
6. Step 6: Final answer
   x = 12,393.89