Finding the Fourth Proportional to 2,852.56, 3,921.72 and 2,834.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,852.56 : 3,921.72 = 2,834.80 : x
2. Step 2: Convert to fraction form
   2,852.56/3,921.72 = 2,834.80/x
3. Step 3: Cross multiply
   2,852.56x = 3,921.72 × 2,834.80
4. Step 4: Simplify right side
   2,852.56x = 11,117,291.86
5. Step 5: Solve for x
   x = 11,117,291.86/2,852.56
6. Step 6: Final answer
   x = 3,897.30