Finding the Fourth Proportional to 10,914.84, 16,369.20 and 3,121.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,914.84 : 16,369.20 = 3,121.56 : x
2. Step 2: Convert to fraction form
   10,914.84/16,369.20 = 3,121.56/x
3. Step 3: Cross multiply
   10,914.84x = 16,369.20 × 3,121.56
4. Step 4: Simplify right side
   10,914.84x = 51,097,439.95
5. Step 5: Solve for x
   x = 51,097,439.95/10,914.84
6. Step 6: Final answer
   x = 4,681.46