Finding the Fourth Proportional to 2,861.56, 4,291.57 and 1,012.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,861.56 : 4,291.57 = 1,012.43 : x
2. Step 2: Convert to fraction form
   2,861.56/4,291.57 = 1,012.43/x
3. Step 3: Cross multiply
   2,861.56x = 4,291.57 × 1,012.43
4. Step 4: Simplify right side
   2,861.56x = 4,344,914.22
5. Step 5: Solve for x
   x = 4,344,914.22/2,861.56
6. Step 6: Final answer
   x = 1,518.37