Finding the Fourth Proportional to 13,005.65, 17,947.77 and 7,037.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,005.65 : 17,947.77 = 7,037.31 : x
2. Step 2: Convert to fraction form
   13,005.65/17,947.77 = 7,037.31/x
3. Step 3: Cross multiply
   13,005.65x = 17,947.77 × 7,037.31
4. Step 4: Simplify right side
   13,005.65x = 126,304,021.30
5. Step 5: Solve for x
   x = 126,304,021.30/13,005.65
6. Step 6: Final answer
   x = 9,711.48