Finding the Fourth Proportional to 10,870.40, 16,303.17 and 5,318.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,870.40 : 16,303.17 = 5,318.16 : x
2. Step 2: Convert to fraction form
   10,870.40/16,303.17 = 5,318.16/x
3. Step 3: Cross multiply
   10,870.40x = 16,303.17 × 5,318.16
4. Step 4: Simplify right side
   10,870.40x = 86,702,825.37
5. Step 5: Solve for x
   x = 86,702,825.37/10,870.40
6. Step 6: Final answer
   x = 7,976.05