Finding the Fourth Proportional to 13,308.72, 19,930.27 and 8,366.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,308.72 : 19,930.27 = 8,366.10 : x
2. Step 2: Convert to fraction form
   13,308.72/19,930.27 = 8,366.10/x
3. Step 3: Cross multiply
   13,308.72x = 19,930.27 × 8,366.10
4. Step 4: Simplify right side
   13,308.72x = 166,738,631.85
5. Step 5: Solve for x
   x = 166,738,631.85/13,308.72
6. Step 6: Final answer
   x = 12,528.53