Finding the Fourth Proportional to 3,856.72, 5,319.72 and 2,461.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,856.72 : 5,319.72 = 2,461.20 : x
2. Step 2: Convert to fraction form
   3,856.72/5,319.72 = 2,461.20/x
3. Step 3: Cross multiply
   3,856.72x = 5,319.72 × 2,461.20
4. Step 4: Simplify right side
   3,856.72x = 13,092,894.86
5. Step 5: Solve for x
   x = 13,092,894.86/3,856.72
6. Step 6: Final answer
   x = 3,394.83