Finding the Fourth Proportional to 10,787.47, 16,181.17 and 4,857.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,787.47 : 16,181.17 = 4,857.42 : x
2. Step 2: Convert to fraction form
   10,787.47/16,181.17 = 4,857.42/x
3. Step 3: Cross multiply
   10,787.47x = 16,181.17 × 4,857.42
4. Step 4: Simplify right side
   10,787.47x = 78,598,738.78
5. Step 5: Solve for x
   x = 78,598,738.78/10,787.47
6. Step 6: Final answer
   x = 7,286.11