Finding the Fourth Proportional to 9,018.42, 12,446.94 and 5,664.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,018.42 : 12,446.94 = 5,664.12 : x
2. Step 2: Convert to fraction form
   9,018.42/12,446.94 = 5,664.12/x
3. Step 3: Cross multiply
   9,018.42x = 12,446.94 × 5,664.12
4. Step 4: Simplify right side
   9,018.42x = 70,500,961.79
5. Step 5: Solve for x
   x = 70,500,961.79/9,018.42
6. Step 6: Final answer
   x = 7,817.44