Finding the Fourth Proportional to 9,209.89, 12,709.05 and 5,433.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,209.89 : 12,709.05 = 5,433.21 : x
2. Step 2: Convert to fraction form
   9,209.89/12,709.05 = 5,433.21/x
3. Step 3: Cross multiply
   9,209.89x = 12,709.05 × 5,433.21
4. Step 4: Simplify right side
   9,209.89x = 69,050,937.55
5. Step 5: Solve for x
   x = 69,050,937.55/9,209.89
6. Step 6: Final answer
   x = 7,497.48