Finding the Fourth Proportional to 2,012.56, 3,018.85 and 916.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.56 : 3,018.85 = 916.16 : x
2. Step 2: Convert to fraction form
   2,012.56/3,018.85 = 916.16/x
3. Step 3: Cross multiply
   2,012.56x = 3,018.85 × 916.16
4. Step 4: Simplify right side
   2,012.56x = 2,765,738.30
5. Step 5: Solve for x
   x = 2,765,738.30/2,012.56
6. Step 6: Final answer
   x = 1,374.24