Finding the Fourth Proportional to 12,326.46, 17,008.56 and 7,021.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,326.46 : 17,008.56 = 7,021.38 : x
2. Step 2: Convert to fraction form
   12,326.46/17,008.56 = 7,021.38/x
3. Step 3: Cross multiply
   12,326.46x = 17,008.56 × 7,021.38
4. Step 4: Simplify right side
   12,326.46x = 119,423,563.01
5. Step 5: Solve for x
   x = 119,423,563.01/12,326.46
6. Step 6: Final answer
   x = 9,688.39