Finding the Fourth Proportional to 13,307.34, 19,928.21 and 8,364.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,307.34 : 19,928.21 = 8,364.72 : x
2. Step 2: Convert to fraction form
   13,307.34/19,928.21 = 8,364.72/x
3. Step 3: Cross multiply
   13,307.34x = 19,928.21 × 8,364.72
4. Step 4: Simplify right side
   13,307.34x = 166,693,854.93
5. Step 5: Solve for x
   x = 166,693,854.93/13,307.34
6. Step 6: Final answer
   x = 12,526.46