Finding the Fourth Proportional to 1,674.69, 2,311.21 and 928.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,674.69 : 2,311.21 = 928.89 : x
2. Step 2: Convert to fraction form
   1,674.69/2,311.21 = 928.89/x
3. Step 3: Cross multiply
   1,674.69x = 2,311.21 × 928.89
4. Step 4: Simplify right side
   1,674.69x = 2,146,861.02
5. Step 5: Solve for x
   x = 2,146,861.02/1,674.69
6. Step 6: Final answer
   x = 1,281.95