Finding the Fourth Proportional to 10,679.40, 16,021.30 and 3,659.94

Step by Step Solution

1. Step 1: Write the proportion equation
   10,679.40 : 16,021.30 = 3,659.94 : x
2. Step 2: Convert to fraction form
   10,679.40/16,021.30 = 3,659.94/x
3. Step 3: Cross multiply
   10,679.40x = 16,021.30 × 3,659.94
4. Step 4: Simplify right side
   10,679.40x = 58,636,996.72
5. Step 5: Solve for x
   x = 58,636,996.72/10,679.40
6. Step 6: Final answer
   x = 5,490.66