Finding the Fourth Proportional to 9,315.98, 13,979 and 7,240.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,315.98 : 13,979 = 7,240.16 : x
2. Step 2: Convert to fraction form
   9,315.98/13,979 = 7,240.16/x
3. Step 3: Cross multiply
   9,315.98x = 13,979 × 7,240.16
4. Step 4: Simplify right side
   9,315.98x = 101,210,196.64
5. Step 5: Solve for x
   x = 101,210,196.64/9,315.98
6. Step 6: Final answer
   x = 10,864.15