Finding the Fourth Proportional to 13,147.92, 19,723.50 and 5,355.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.92 : 19,723.50 = 5,355.72 : x
2. Step 2: Convert to fraction form
   13,147.92/19,723.50 = 5,355.72/x
3. Step 3: Cross multiply
   13,147.92x = 19,723.50 × 5,355.72
4. Step 4: Simplify right side
   13,147.92x = 105,633,543.42
5. Step 5: Solve for x
   x = 105,633,543.42/13,147.92
6. Step 6: Final answer
   x = 8,034.24