Finding the Fourth Proportional to 12,802.65, 17,667.72 and 7,137.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,802.65 : 17,667.72 = 7,137.75 : x
2. Step 2: Convert to fraction form
   12,802.65/17,667.72 = 7,137.75/x
3. Step 3: Cross multiply
   12,802.65x = 17,667.72 × 7,137.75
4. Step 4: Simplify right side
   12,802.65x = 126,107,768.43
5. Step 5: Solve for x
   x = 126,107,768.43/12,802.65
6. Step 6: Final answer
   x = 9,850.13