Finding the Fourth Proportional to 12,802.88, 17,665.83 and 7,136.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,802.88 : 17,665.83 = 7,136.39 : x
2. Step 2: Convert to fraction form
   12,802.88/17,665.83 = 7,136.39/x
3. Step 3: Cross multiply
   12,802.88x = 17,665.83 × 7,136.39
4. Step 4: Simplify right side
   12,802.88x = 126,070,216.87
5. Step 5: Solve for x
   x = 126,070,216.87/12,802.88
6. Step 6: Final answer
   x = 9,847.02