Finding the Fourth Proportional to 1,426.49, 1,967.01 and 928.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.49 : 1,967.01 = 928.21 : x
2. Step 2: Convert to fraction form
   1,426.49/1,967.01 = 928.21/x
3. Step 3: Cross multiply
   1,426.49x = 1,967.01 × 928.21
4. Step 4: Simplify right side
   1,426.49x = 1,825,783.88
5. Step 5: Solve for x
   x = 1,825,783.88/1,426.49
6. Step 6: Final answer
   x = 1,279.91