Finding the Fourth Proportional to 12,984.10, 17,913.76 and 7,318.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,984.10 : 17,913.76 = 7,318.15 : x
2. Step 2: Convert to fraction form
   12,984.10/17,913.76 = 7,318.15/x
3. Step 3: Cross multiply
   12,984.10x = 17,913.76 × 7,318.15
4. Step 4: Simplify right side
   12,984.10x = 131,095,519.66
5. Step 5: Solve for x
   x = 131,095,519.66/12,984.10
6. Step 6: Final answer
   x = 10,096.62