Finding the Fourth Proportional to 2,606.42, 3,909.54 and 875

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.42 : 3,909.54 = 875 : x
2. Step 2: Convert to fraction form
   2,606.42/3,909.54 = 875/x
3. Step 3: Cross multiply
   2,606.42x = 3,909.54 × 875
4. Step 4: Simplify right side
   2,606.42x = 3,420,847.50
5. Step 5: Solve for x
   x = 3,420,847.50/2,606.42
6. Step 6: Final answer
   x = 1,312.47