Finding the Fourth Proportional to 2,878.35, 4,317.42 and 930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,878.35 : 4,317.42 = 930.50 : x
2. Step 2: Convert to fraction form
   2,878.35/4,317.42 = 930.50/x
3. Step 3: Cross multiply
   2,878.35x = 4,317.42 × 930.50
4. Step 4: Simplify right side
   2,878.35x = 4,017,359.31
5. Step 5: Solve for x
   x = 4,017,359.31/2,878.35
6. Step 6: Final answer
   x = 1,395.72