Finding the Fourth Proportional to 1,228.71, 1,841.27 and 570.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.71 : 1,841.27 = 570.79 : x
2. Step 2: Convert to fraction form
   1,228.71/1,841.27 = 570.79/x
3. Step 3: Cross multiply
   1,228.71x = 1,841.27 × 570.79
4. Step 4: Simplify right side
   1,228.71x = 1,050,978.50
5. Step 5: Solve for x
   x = 1,050,978.50/1,228.71
6. Step 6: Final answer
   x = 855.35