Finding the Fourth Proportional to 3,861.12, 5,328.96 and 2,182.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,861.12 : 5,328.96 = 2,182.72 : x
2. Step 2: Convert to fraction form
   3,861.12/5,328.96 = 2,182.72/x
3. Step 3: Cross multiply
   3,861.12x = 5,328.96 × 2,182.72
4. Step 4: Simplify right side
   3,861.12x = 11,631,627.57
5. Step 5: Solve for x
   x = 11,631,627.57/3,861.12
6. Step 6: Final answer
   x = 3,012.50