Finding the Fourth Proportional to 2,470.89, 3,705.02 and 826.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.89 : 3,705.02 = 826.90 : x
2. Step 2: Convert to fraction form
   2,470.89/3,705.02 = 826.90/x
3. Step 3: Cross multiply
   2,470.89x = 3,705.02 × 826.90
4. Step 4: Simplify right side
   2,470.89x = 3,063,681.04
5. Step 5: Solve for x
   x = 3,063,681.04/2,470.89
6. Step 6: Final answer
   x = 1,239.91