Finding the Fourth Proportional to 3,783.47, 5,221.38 and 2,105.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,783.47 : 5,221.38 = 2,105.03 : x
2. Step 2: Convert to fraction form
   3,783.47/5,221.38 = 2,105.03/x
3. Step 3: Cross multiply
   3,783.47x = 5,221.38 × 2,105.03
4. Step 4: Simplify right side
   3,783.47x = 10,991,156.50
5. Step 5: Solve for x
   x = 10,991,156.50/3,783.47
6. Step 6: Final answer
   x = 2,905.05