Finding the Fourth Proportional to 3,641.76, 5,469.12 and 1,905.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,641.76 : 5,469.12 = 1,905.12 : x
2. Step 2: Convert to fraction form
   3,641.76/5,469.12 = 1,905.12/x
3. Step 3: Cross multiply
   3,641.76x = 5,469.12 × 1,905.12
4. Step 4: Simplify right side
   3,641.76x = 10,419,329.89
5. Step 5: Solve for x
   x = 10,419,329.89/3,641.76
6. Step 6: Final answer
   x = 2,861.07