Finding the Fourth Proportional to 9,019.63, 12,446.85 and 5,040.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,019.63 : 12,446.85 = 5,040.78 : x
2. Step 2: Convert to fraction form
   9,019.63/12,446.85 = 5,040.78/x
3. Step 3: Cross multiply
   9,019.63x = 12,446.85 × 5,040.78
4. Step 4: Simplify right side
   9,019.63x = 62,741,832.54
5. Step 5: Solve for x
   x = 62,741,832.54/9,019.63
6. Step 6: Final answer
   x = 6,956.14