Finding the Fourth Proportional to 9,372.78, 12,934.38 and 5,181

Step by Step Solution

1. Step 1: Write the proportion equation
   9,372.78 : 12,934.38 = 5,181 : x
2. Step 2: Convert to fraction form
   9,372.78/12,934.38 = 5,181/x
3. Step 3: Cross multiply
   9,372.78x = 12,934.38 × 5,181
4. Step 4: Simplify right side
   9,372.78x = 67,013,022.78
5. Step 5: Solve for x
   x = 67,013,022.78/9,372.78
6. Step 6: Final answer
   x = 7,149.75