Finding the Fourth Proportional to 2,812.89, 4,219.94 and 1,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,812.89 : 4,219.94 = 1,081.50 : x
2. Step 2: Convert to fraction form
   2,812.89/4,219.94 = 1,081.50/x
3. Step 3: Cross multiply
   2,812.89x = 4,219.94 × 1,081.50
4. Step 4: Simplify right side
   2,812.89x = 4,563,859.70
5. Step 5: Solve for x
   x = 4,563,859.70/2,812.89
6. Step 6: Final answer
   x = 1,622.48