Finding the Fourth Proportional to 7,217.47, 10,818.78 and 3,929.68

Step by Step Solution

1. Step 1: Write the proportion equation
   7,217.47 : 10,818.78 = 3,929.68 : x
2. Step 2: Convert to fraction form
   7,217.47/10,818.78 = 3,929.68/x
3. Step 3: Cross multiply
   7,217.47x = 10,818.78 × 3,929.68
4. Step 4: Simplify right side
   7,217.47x = 42,514,343.39
5. Step 5: Solve for x
   x = 42,514,343.39/7,217.47
6. Step 6: Final answer
   x = 5,890.48