Finding the Fourth Proportional to 2,782.81, 3,835.61 and 2,221.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,782.81 : 3,835.61 = 2,221.48 : x
2. Step 2: Convert to fraction form
   2,782.81/3,835.61 = 2,221.48/x
3. Step 3: Cross multiply
   2,782.81x = 3,835.61 × 2,221.48
4. Step 4: Simplify right side
   2,782.81x = 8,520,718.54
5. Step 5: Solve for x
   x = 8,520,718.54/2,782.81
6. Step 6: Final answer
   x = 3,061.91