Finding the Fourth Proportional to 9,002.45, 12,421.89 and 5,226.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,002.45 : 12,421.89 = 5,226.23 : x
2. Step 2: Convert to fraction form
   9,002.45/12,421.89 = 5,226.23/x
3. Step 3: Cross multiply
   9,002.45x = 12,421.89 × 5,226.23
4. Step 4: Simplify right side
   9,002.45x = 64,919,685.23
5. Step 5: Solve for x
   x = 64,919,685.23/9,002.45
6. Step 6: Final answer
   x = 7,211.33