Finding the Fourth Proportional to 16,916.72, 25,373.52 and 5,228.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,916.72 : 25,373.52 = 5,228.78 : x
2. Step 2: Convert to fraction form
   16,916.72/25,373.52 = 5,228.78/x
3. Step 3: Cross multiply
   16,916.72x = 25,373.52 × 5,228.78
4. Step 4: Simplify right side
   16,916.72x = 132,672,553.91
5. Step 5: Solve for x
   x = 132,672,553.91/16,916.72
6. Step 6: Final answer
   x = 7,842.69