Finding the Fourth Proportional to 10,880.02, 16,293.31 and 5,315.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,880.02 : 16,293.31 = 5,315.42 : x
2. Step 2: Convert to fraction form
   10,880.02/16,293.31 = 5,315.42/x
3. Step 3: Cross multiply
   10,880.02x = 16,293.31 × 5,315.42
4. Step 4: Simplify right side
   10,880.02x = 86,605,833.22
5. Step 5: Solve for x
   x = 86,605,833.22/10,880.02
6. Step 6: Final answer
   x = 7,960.08