Finding the Fourth Proportional to 1,371.42, 1,893.78 and 930.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,371.42 : 1,893.78 = 930.96 : x
2. Step 2: Convert to fraction form
   1,371.42/1,893.78 = 930.96/x
3. Step 3: Cross multiply
   1,371.42x = 1,893.78 × 930.96
4. Step 4: Simplify right side
   1,371.42x = 1,763,033.43
5. Step 5: Solve for x
   x = 1,763,033.43/1,371.42
6. Step 6: Final answer
   x = 1,285.55