Finding the Fourth Proportional to 2,379.27, 3,570.52 and 840.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.27 : 3,570.52 = 840.27 : x
2. Step 2: Convert to fraction form
   2,379.27/3,570.52 = 840.27/x
3. Step 3: Cross multiply
   2,379.27x = 3,570.52 × 840.27
4. Step 4: Simplify right side
   2,379.27x = 3,000,200.84
5. Step 5: Solve for x
   x = 3,000,200.84/2,379.27
6. Step 6: Final answer
   x = 1,260.98