Finding the Fourth Proportional to 2,645.10, 3,961.17 and 2,055.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.10 : 3,961.17 = 2,055.69 : x
2. Step 2: Convert to fraction form
   2,645.10/3,961.17 = 2,055.69/x
3. Step 3: Cross multiply
   2,645.10x = 3,961.17 × 2,055.69
4. Step 4: Simplify right side
   2,645.10x = 8,142,937.56
5. Step 5: Solve for x
   x = 8,142,937.56/2,645.10
6. Step 6: Final answer
   x = 3,078.50