Finding the Fourth Proportional to 3,843.30, 5,300.20 and 2,851.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,843.30 : 5,300.20 = 2,851.05 : x
2. Step 2: Convert to fraction form
   3,843.30/5,300.20 = 2,851.05/x
3. Step 3: Cross multiply
   3,843.30x = 5,300.20 × 2,851.05
4. Step 4: Simplify right side
   3,843.30x = 15,111,094.45
5. Step 5: Solve for x
   x = 15,111,094.45/3,843.30
6. Step 6: Final answer
   x = 3,931.81