Finding the Fourth Proportional to 3,919.72, 5,874.78 and 2,623.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,919.72 : 5,874.78 = 2,623.72 : x
2. Step 2: Convert to fraction form
   3,919.72/5,874.78 = 2,623.72/x
3. Step 3: Cross multiply
   3,919.72x = 5,874.78 × 2,623.72
4. Step 4: Simplify right side
   3,919.72x = 15,413,777.78
5. Step 5: Solve for x
   x = 15,413,777.78/3,919.72
6. Step 6: Final answer
   x = 3,932.37