Finding the Fourth Proportional to 9,266.69, 12,786.83 and 5,287.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,266.69 : 12,786.83 = 5,287.56 : x
2. Step 2: Convert to fraction form
   9,266.69/12,786.83 = 5,287.56/x
3. Step 3: Cross multiply
   9,266.69x = 12,786.83 × 5,287.56
4. Step 4: Simplify right side
   9,266.69x = 67,611,130.83
5. Step 5: Solve for x
   x = 67,611,130.83/9,266.69
6. Step 6: Final answer
   x = 7,296.15