Finding the Fourth Proportional to 9,266.67, 12,788.15 and 5,489.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,266.67 : 12,788.15 = 5,489.78 : x
2. Step 2: Convert to fraction form
   9,266.67/12,788.15 = 5,489.78/x
3. Step 3: Cross multiply
   9,266.67x = 12,788.15 × 5,489.78
4. Step 4: Simplify right side
   9,266.67x = 70,204,038.72
5. Step 5: Solve for x
   x = 70,204,038.72/9,266.67
6. Step 6: Final answer
   x = 7,575.97