Finding the Fourth Proportional to 2,470.77, 3,705.21 and 826.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,470.77 : 3,705.21 = 826.88 : x
2. Step 2: Convert to fraction form
   2,470.77/3,705.21 = 826.88/x
3. Step 3: Cross multiply
   2,470.77x = 3,705.21 × 826.88
4. Step 4: Simplify right side
   2,470.77x = 3,063,745.52
5. Step 5: Solve for x
   x = 3,063,745.52/2,470.77
6. Step 6: Final answer
   x = 1,240.00