Finding the Fourth Proportional to 8,924.31, 12,315.54 and 5,147.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,924.31 : 12,315.54 = 5,147.42 : x
2. Step 2: Convert to fraction form
   8,924.31/12,315.54 = 5,147.42/x
3. Step 3: Cross multiply
   8,924.31x = 12,315.54 × 5,147.42
4. Step 4: Simplify right side
   8,924.31x = 63,393,256.91
5. Step 5: Solve for x
   x = 63,393,256.91/8,924.31
6. Step 6: Final answer
   x = 7,103.44