Finding the Fourth Proportional to 2,606.76, 3,908.90 and 874.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.76 : 3,908.90 = 874.12 : x
2. Step 2: Convert to fraction form
   2,606.76/3,908.90 = 874.12/x
3. Step 3: Cross multiply
   2,606.76x = 3,908.90 × 874.12
4. Step 4: Simplify right side
   2,606.76x = 3,416,847.67
5. Step 5: Solve for x
   x = 3,416,847.67/2,606.76
6. Step 6: Final answer
   x = 1,310.76