Finding the Fourth Proportional to 1,294.89, 1,940.59 and 928.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.89 : 1,940.59 = 928.87 : x
2. Step 2: Convert to fraction form
   1,294.89/1,940.59 = 928.87/x
3. Step 3: Cross multiply
   1,294.89x = 1,940.59 × 928.87
4. Step 4: Simplify right side
   1,294.89x = 1,802,555.83
5. Step 5: Solve for x
   x = 1,802,555.83/1,294.89
6. Step 6: Final answer
   x = 1,392.05