Finding the Fourth Proportional to 13,307.72, 19,928.77 and 8,365.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.72 : 19,928.77 = 8,365.10 : x
2. Step 2: Convert to fraction form
   13,307.72/19,928.77 = 8,365.10/x
3. Step 3: Cross multiply
   13,307.72x = 19,928.77 × 8,365.10
4. Step 4: Simplify right side
   13,307.72x = 166,706,033.37
5. Step 5: Solve for x
   x = 166,706,033.37/13,307.72
6. Step 6: Final answer
   x = 12,527.02