Finding the Fourth Proportional to 9,039.43, 12,478.95 and 5,684.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,039.43 : 12,478.95 = 5,684.09 : x
2. Step 2: Convert to fraction form
   9,039.43/12,478.95 = 5,684.09/x
3. Step 3: Cross multiply
   9,039.43x = 12,478.95 × 5,684.09
4. Step 4: Simplify right side
   9,039.43x = 70,931,484.79
5. Step 5: Solve for x
   x = 70,931,484.79/9,039.43
6. Step 6: Final answer
   x = 7,846.90