Finding the Fourth Proportional to 9,419.42, 12,999.39 and 5,227.67

Step by Step Solution

1. Step 1: Write the proportion equation
   9,419.42 : 12,999.39 = 5,227.67 : x
2. Step 2: Convert to fraction form
   9,419.42/12,999.39 = 5,227.67/x
3. Step 3: Cross multiply
   9,419.42x = 12,999.39 × 5,227.67
4. Step 4: Simplify right side
   9,419.42x = 67,956,534.02
5. Step 5: Solve for x
   x = 67,956,534.02/9,419.42
6. Step 6: Final answer
   x = 7,214.51