Finding the Fourth Proportional to 3,784.17, 5,221.66 and 2,105.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.17 : 5,221.66 = 2,105.25 : x
2. Step 2: Convert to fraction form
   3,784.17/5,221.66 = 2,105.25/x
3. Step 3: Cross multiply
   3,784.17x = 5,221.66 × 2,105.25
4. Step 4: Simplify right side
   3,784.17x = 10,992,899.72
5. Step 5: Solve for x
   x = 10,992,899.72/3,784.17
6. Step 6: Final answer
   x = 2,904.97