Finding the Fourth Proportional to 2,012.49, 3,018.60 and 916.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.49 : 3,018.60 = 916.56 : x
2. Step 2: Convert to fraction form
   2,012.49/3,018.60 = 916.56/x
3. Step 3: Cross multiply
   2,012.49x = 3,018.60 × 916.56
4. Step 4: Simplify right side
   2,012.49x = 2,766,728.02
5. Step 5: Solve for x
   x = 2,766,728.02/2,012.49
6. Step 6: Final answer
   x = 1,374.78