Finding the Fourth Proportional to 9,360.28, 12,978.73 and 9,048.03

Step by Step Solution

1. Step 1: Write the proportion equation
   9,360.28 : 12,978.73 = 9,048.03 : x
2. Step 2: Convert to fraction form
   9,360.28/12,978.73 = 9,048.03/x
3. Step 3: Cross multiply
   9,360.28x = 12,978.73 × 9,048.03
4. Step 4: Simplify right side
   9,360.28x = 117,431,938.40
5. Step 5: Solve for x
   x = 117,431,938.40/9,360.28
6. Step 6: Final answer
   x = 12,545.77