Finding the Fourth Proportional to 2,606.66, 3,910.59 and 875.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.66 : 3,910.59 = 875.28 : x
2. Step 2: Convert to fraction form
   2,606.66/3,910.59 = 875.28/x
3. Step 3: Cross multiply
   2,606.66x = 3,910.59 × 875.28
4. Step 4: Simplify right side
   2,606.66x = 3,422,861.22
5. Step 5: Solve for x
   x = 3,422,861.22/2,606.66
6. Step 6: Final answer
   x = 1,313.12