Finding the Fourth Proportional to 2,470.28, 3,705.71 and 826.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.28 : 3,705.71 = 826.46 : x
2. Step 2: Convert to fraction form
   2,470.28/3,705.71 = 826.46/x
3. Step 3: Cross multiply
   2,470.28x = 3,705.71 × 826.46
4. Step 4: Simplify right side
   2,470.28x = 3,062,598.43
5. Step 5: Solve for x
   x = 3,062,598.43/2,470.28
6. Step 6: Final answer
   x = 1,239.78