Finding the Fourth Proportional to 9,018.63, 12,446.89 and 5,040.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,018.63 : 12,446.89 = 5,040.57 : x
2. Step 2: Convert to fraction form
   9,018.63/12,446.89 = 5,040.57/x
3. Step 3: Cross multiply
   9,018.63x = 12,446.89 × 5,040.57
4. Step 4: Simplify right side
   9,018.63x = 62,739,407.73
5. Step 5: Solve for x
   x = 62,739,407.73/9,018.63
6. Step 6: Final answer
   x = 6,956.65