Finding the Fourth Proportional to 2,012.58, 3,018.33 and 916.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.58 : 3,018.33 = 916.38 : x
2. Step 2: Convert to fraction form
   2,012.58/3,018.33 = 916.38/x
3. Step 3: Cross multiply
   2,012.58x = 3,018.33 × 916.38
4. Step 4: Simplify right side
   2,012.58x = 2,765,937.25
5. Step 5: Solve for x
   x = 2,765,937.25/2,012.58
6. Step 6: Final answer
   x = 1,374.32