Finding the Fourth Proportional to 2,606.17, 3,909.81 and 874.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.17 : 3,909.81 = 874.75 : x
2. Step 2: Convert to fraction form
   2,606.17/3,909.81 = 874.75/x
3. Step 3: Cross multiply
   2,606.17x = 3,909.81 × 874.75
4. Step 4: Simplify right side
   2,606.17x = 3,420,106.30
5. Step 5: Solve for x
   x = 3,420,106.30/2,606.17
6. Step 6: Final answer
   x = 1,312.31