Finding the Fourth Proportional to 10,972.72, 16,461.78 and 3,181.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,972.72 : 16,461.78 = 3,181.42 : x
2. Step 2: Convert to fraction form
   10,972.72/16,461.78 = 3,181.42/x
3. Step 3: Cross multiply
   10,972.72x = 16,461.78 × 3,181.42
4. Step 4: Simplify right side
   10,972.72x = 52,371,836.13
5. Step 5: Solve for x
   x = 52,371,836.13/10,972.72
6. Step 6: Final answer
   x = 4,772.91