Finding the Fourth Proportional to 2,864.39, 4,295.57 and 916.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.39 : 4,295.57 = 916.07 : x
2. Step 2: Convert to fraction form
   2,864.39/4,295.57 = 916.07/x
3. Step 3: Cross multiply
   2,864.39x = 4,295.57 × 916.07
4. Step 4: Simplify right side
   2,864.39x = 3,935,016.75
5. Step 5: Solve for x
   x = 3,935,016.75/2,864.39
6. Step 6: Final answer
   x = 1,373.77