Finding the Fourth Proportional to 10,939.57, 16,408.56 and 4,274.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,939.57 : 16,408.56 = 4,274.81 : x
2. Step 2: Convert to fraction form
   10,939.57/16,408.56 = 4,274.81/x
3. Step 3: Cross multiply
   10,939.57x = 16,408.56 × 4,274.81
4. Step 4: Simplify right side
   10,939.57x = 70,143,496.02
5. Step 5: Solve for x
   x = 70,143,496.02/10,939.57
6. Step 6: Final answer
   x = 6,411.91