Finding the Fourth Proportional to 12,321.10, 17,007.74 and 9,344.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.10 : 17,007.74 = 9,344.05 : x
2. Step 2: Convert to fraction form
   12,321.10/17,007.74 = 9,344.05/x
3. Step 3: Cross multiply
   12,321.10x = 17,007.74 × 9,344.05
4. Step 4: Simplify right side
   12,321.10x = 158,921,172.95
5. Step 5: Solve for x
   x = 158,921,172.95/12,321.10
6. Step 6: Final answer
   x = 12,898.29