Finding the Fourth Proportional to 8,543.27, 12,796.89 and 5,421.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,543.27 : 12,796.89 = 5,421.63 : x
2. Step 2: Convert to fraction form
   8,543.27/12,796.89 = 5,421.63/x
3. Step 3: Cross multiply
   8,543.27x = 12,796.89 × 5,421.63
4. Step 4: Simplify right side
   8,543.27x = 69,380,002.73
5. Step 5: Solve for x
   x = 69,380,002.73/8,543.27
6. Step 6: Final answer
   x = 8,121.01