Finding the Fourth Proportional to 6,438.42, 9,642.51 and 3,141.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,438.42 : 9,642.51 = 3,141.18 : x
2. Step 2: Convert to fraction form
   6,438.42/9,642.51 = 3,141.18/x
3. Step 3: Cross multiply
   6,438.42x = 9,642.51 × 3,141.18
4. Step 4: Simplify right side
   6,438.42x = 30,288,859.56
5. Step 5: Solve for x
   x = 30,288,859.56/6,438.42
6. Step 6: Final answer
   x = 4,704.39