Finding the Fourth Proportional to 9,372.54, 12,933.32 and 5,180.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,372.54 : 12,933.32 = 5,180.78 : x
2. Step 2: Convert to fraction form
   9,372.54/12,933.32 = 5,180.78/x
3. Step 3: Cross multiply
   9,372.54x = 12,933.32 × 5,180.78
4. Step 4: Simplify right side
   9,372.54x = 67,004,685.59
5. Step 5: Solve for x
   x = 67,004,685.59/9,372.54
6. Step 6: Final answer
   x = 7,149.04