Finding the Fourth Proportional to 12,375.61, 18,538.69 and 7,442.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,375.61 : 18,538.69 = 7,442.54 : x
2. Step 2: Convert to fraction form
   12,375.61/18,538.69 = 7,442.54/x
3. Step 3: Cross multiply
   12,375.61x = 18,538.69 × 7,442.54
4. Step 4: Simplify right side
   12,375.61x = 137,974,941.87
5. Step 5: Solve for x
   x = 137,974,941.87/12,375.61
6. Step 6: Final answer
   x = 11,148.94