Finding the Fourth Proportional to 11,123.50, 16,688.58 and 6,442.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,123.50 : 16,688.58 = 6,442.42 : x
2. Step 2: Convert to fraction form
   11,123.50/16,688.58 = 6,442.42/x
3. Step 3: Cross multiply
   11,123.50x = 16,688.58 × 6,442.42
4. Step 4: Simplify right side
   11,123.50x = 107,514,841.56
5. Step 5: Solve for x
   x = 107,514,841.56/11,123.50
6. Step 6: Final answer
   x = 9,665.56