Finding the Fourth Proportional to 7,116.05, 9,819.98 and 3,929.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,116.05 : 9,819.98 = 3,929.61 : x
2. Step 2: Convert to fraction form
   7,116.05/9,819.98 = 3,929.61/x
3. Step 3: Cross multiply
   7,116.05x = 9,819.98 × 3,929.61
4. Step 4: Simplify right side
   7,116.05x = 38,588,745.62
5. Step 5: Solve for x
   x = 38,588,745.62/7,116.05
6. Step 6: Final answer
   x = 5,422.77