Finding the Fourth Proportional to 2,864.56, 4,296.78 and 916.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.56 : 4,296.78 = 916.74 : x
2. Step 2: Convert to fraction form
   2,864.56/4,296.78 = 916.74/x
3. Step 3: Cross multiply
   2,864.56x = 4,296.78 × 916.74
4. Step 4: Simplify right side
   2,864.56x = 3,939,030.10
5. Step 5: Solve for x
   x = 3,939,030.10/2,864.56
6. Step 6: Final answer
   x = 1,375.09