Finding the Fourth Proportional to 13,814.67, 20,742.78 and 8,292.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,814.67 : 20,742.78 = 8,292.72 : x
2. Step 2: Convert to fraction form
   13,814.67/20,742.78 = 8,292.72/x
3. Step 3: Cross multiply
   13,814.67x = 20,742.78 × 8,292.72
4. Step 4: Simplify right side
   13,814.67x = 172,014,066.56
5. Step 5: Solve for x
   x = 172,014,066.56/13,814.67
6. Step 6: Final answer
   x = 12,451.55