Finding the Fourth Proportional to 9,361.42, 12,918.72 and 5,169.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,361.42 : 12,918.72 = 5,169.70 : x
2. Step 2: Convert to fraction form
   9,361.42/12,918.72 = 5,169.70/x
3. Step 3: Cross multiply
   9,361.42x = 12,918.72 × 5,169.70
4. Step 4: Simplify right side
   9,361.42x = 66,785,906.78
5. Step 5: Solve for x
   x = 66,785,906.78/9,361.42
6. Step 6: Final answer
   x = 7,134.16