Finding the Fourth Proportional to 2,878.54, 4,317.91 and 930.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,878.54 : 4,317.91 = 930.69 : x
2. Step 2: Convert to fraction form
   2,878.54/4,317.91 = 930.69/x
3. Step 3: Cross multiply
   2,878.54x = 4,317.91 × 930.69
4. Step 4: Simplify right side
   2,878.54x = 4,018,633.33
5. Step 5: Solve for x
   x = 4,018,633.33/2,878.54
6. Step 6: Final answer
   x = 1,396.07