Finding the Fourth Proportional to 10,915.68, 16,374.56 and 3,518.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,915.68 : 16,374.56 = 3,518.16 : x
2. Step 2: Convert to fraction form
   10,915.68/16,374.56 = 3,518.16/x
3. Step 3: Cross multiply
   10,915.68x = 16,374.56 × 3,518.16
4. Step 4: Simplify right side
   10,915.68x = 57,608,322.01
5. Step 5: Solve for x
   x = 57,608,322.01/10,915.68
6. Step 6: Final answer
   x = 5,277.58