Finding the Fourth Proportional to 10,915.31, 16,376.16 and 3,519.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.31 : 16,376.16 = 3,519.62 : x
2. Step 2: Convert to fraction form
   10,915.31/16,376.16 = 3,519.62/x
3. Step 3: Cross multiply
   10,915.31x = 16,376.16 × 3,519.62
4. Step 4: Simplify right side
   10,915.31x = 57,637,860.26
5. Step 5: Solve for x
   x = 57,637,860.26/10,915.31
6. Step 6: Final answer
   x = 5,280.46