Finding the Fourth Proportional to 10,921.62, 16,384.05 and 3,994.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.62 : 16,384.05 = 3,994.50 : x
2. Step 2: Convert to fraction form
   10,921.62/16,384.05 = 3,994.50/x
3. Step 3: Cross multiply
   10,921.62x = 16,384.05 × 3,994.50
4. Step 4: Simplify right side
   10,921.62x = 65,446,087.73
5. Step 5: Solve for x
   x = 65,446,087.73/10,921.62
6. Step 6: Final answer
   x = 5,992.34