Finding the Fourth Proportional to 11,973.61, 16,504.72 and 9,131.73

Step by Step Solution

1. Step 1: Write the proportion equation
   11,973.61 : 16,504.72 = 9,131.73 : x
2. Step 2: Convert to fraction form
   11,973.61/16,504.72 = 9,131.73/x
3. Step 3: Cross multiply
   11,973.61x = 16,504.72 × 9,131.73
4. Step 4: Simplify right side
   11,973.61x = 150,716,646.77
5. Step 5: Solve for x
   x = 150,716,646.77/11,973.61
6. Step 6: Final answer
   x = 12,587.40