Finding the Fourth Proportional to 10,913.30, 16,361.16 and 3,515.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,913.30 : 16,361.16 = 3,515.78 : x
2. Step 2: Convert to fraction form
   10,913.30/16,361.16 = 3,515.78/x
3. Step 3: Cross multiply
   10,913.30x = 16,361.16 × 3,515.78
4. Step 4: Simplify right side
   10,913.30x = 57,522,239.10
5. Step 5: Solve for x
   x = 57,522,239.10/10,913.30
6. Step 6: Final answer
   x = 5,270.84