Finding the Fourth Proportional to 13,309.72, 19,931.77 and 8,367.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,309.72 : 19,931.77 = 8,367.10 : x
2. Step 2: Convert to fraction form
   13,309.72/19,931.77 = 8,367.10/x
3. Step 3: Cross multiply
   13,309.72x = 19,931.77 × 8,367.10
4. Step 4: Simplify right side
   13,309.72x = 166,771,112.77
5. Step 5: Solve for x
   x = 166,771,112.77/13,309.72
6. Step 6: Final answer
   x = 12,530.02