Finding the Fourth Proportional to 2,012.35, 3,019.56 and 916.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.35 : 3,019.56 = 916.57 : x
2. Step 2: Convert to fraction form
   2,012.35/3,019.56 = 916.57/x
3. Step 3: Cross multiply
   2,012.35x = 3,019.56 × 916.57
4. Step 4: Simplify right side
   2,012.35x = 2,767,638.11
5. Step 5: Solve for x
   x = 2,767,638.11/2,012.35
6. Step 6: Final answer
   x = 1,375.33