Finding the Fourth Proportional to 10,920.87, 16,384.76 and 3,900.73

Step by Step Solution

1. Step 1: Write the proportion equation
   10,920.87 : 16,384.76 = 3,900.73 : x
2. Step 2: Convert to fraction form
   10,920.87/16,384.76 = 3,900.73/x
3. Step 3: Cross multiply
   10,920.87x = 16,384.76 × 3,900.73
4. Step 4: Simplify right side
   10,920.87x = 63,912,524.87
5. Step 5: Solve for x
   x = 63,912,524.87/10,920.87
6. Step 6: Final answer
   x = 5,852.33