Finding the Fourth Proportional to 12,907.29, 17,813.41 and 7,243.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,907.29 : 17,813.41 = 7,243.57 : x
2. Step 2: Convert to fraction form
   12,907.29/17,813.41 = 7,243.57/x
3. Step 3: Cross multiply
   12,907.29x = 17,813.41 × 7,243.57
4. Step 4: Simplify right side
   12,907.29x = 129,032,682.27
5. Step 5: Solve for x
   x = 129,032,682.27/12,907.29
6. Step 6: Final answer
   x = 9,996.88