Finding the Fourth Proportional to 1,674.91, 2,311.33 and 928.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,674.91 : 2,311.33 = 928.86 : x
2. Step 2: Convert to fraction form
   1,674.91/2,311.33 = 928.86/x
3. Step 3: Cross multiply
   1,674.91x = 2,311.33 × 928.86
4. Step 4: Simplify right side
   1,674.91x = 2,146,901.98
5. Step 5: Solve for x
   x = 2,146,901.98/1,674.91
6. Step 6: Final answer
   x = 1,281.80