Finding the Fourth Proportional to 9,267.35, 12,788.15 and 5,287.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,267.35 : 12,788.15 = 5,287.68 : x
2. Step 2: Convert to fraction form
   9,267.35/12,788.15 = 5,287.68/x
3. Step 3: Cross multiply
   9,267.35x = 12,788.15 × 5,287.68
4. Step 4: Simplify right side
   9,267.35x = 67,619,618.55
5. Step 5: Solve for x
   x = 67,619,618.55/9,267.35
6. Step 6: Final answer
   x = 7,296.55