Finding the Fourth Proportional to 2,636.59, 3,956.73 and 1,945.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.59 : 3,956.73 = 1,945.05 : x
2. Step 2: Convert to fraction form
   2,636.59/3,956.73 = 1,945.05/x
3. Step 3: Cross multiply
   2,636.59x = 3,956.73 × 1,945.05
4. Step 4: Simplify right side
   2,636.59x = 7,696,037.69
5. Step 5: Solve for x
   x = 7,696,037.69/2,636.59
6. Step 6: Final answer
   x = 2,918.94