Finding the Fourth Proportional to 7,230.72, 10,831.52 and 5,478.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,230.72 : 10,831.52 = 5,478.72 : x
2. Step 2: Convert to fraction form
   7,230.72/10,831.52 = 5,478.72/x
3. Step 3: Cross multiply
   7,230.72x = 10,831.52 × 5,478.72
4. Step 4: Simplify right side
   7,230.72x = 59,342,865.25
5. Step 5: Solve for x
   x = 59,342,865.25/7,230.72
6. Step 6: Final answer
   x = 8,207.05