Finding the Fourth Proportional to 1,508.56, 2,081.46 and 1,012.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,508.56 : 2,081.46 = 1,012.12 : x
2. Step 2: Convert to fraction form
   1,508.56/2,081.46 = 1,012.12/x
3. Step 3: Cross multiply
   1,508.56x = 2,081.46 × 1,012.12
4. Step 4: Simplify right side
   1,508.56x = 2,106,687.30
5. Step 5: Solve for x
   x = 2,106,687.30/1,508.56
6. Step 6: Final answer
   x = 1,396.49