Finding the Fourth Proportional to 2,636.84, 3,931.74 and 2,604.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.84 : 3,931.74 = 2,604.54 : x
2. Step 2: Convert to fraction form
   2,636.84/3,931.74 = 2,604.54/x
3. Step 3: Cross multiply
   2,636.84x = 3,931.74 × 2,604.54
4. Step 4: Simplify right side
   2,636.84x = 10,240,374.10
5. Step 5: Solve for x
   x = 10,240,374.10/2,636.84
6. Step 6: Final answer
   x = 3,883.59