Finding the Fourth Proportional to 1,517.76, 2,094.88 and 928.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,517.76 : 2,094.88 = 928.78 : x
2. Step 2: Convert to fraction form
   1,517.76/2,094.88 = 928.78/x
3. Step 3: Cross multiply
   1,517.76x = 2,094.88 × 928.78
4. Step 4: Simplify right side
   1,517.76x = 1,945,682.65
5. Step 5: Solve for x
   x = 1,945,682.65/1,517.76
6. Step 6: Final answer
   x = 1,281.94