Finding the Fourth Proportional to 2,606.70, 3,909.81 and 875.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.70 : 3,909.81 = 875.34 : x
2. Step 2: Convert to fraction form
   2,606.70/3,909.81 = 875.34/x
3. Step 3: Cross multiply
   2,606.70x = 3,909.81 × 875.34
4. Step 4: Simplify right side
   2,606.70x = 3,422,413.09
5. Step 5: Solve for x
   x = 3,422,413.09/2,606.70
6. Step 6: Final answer
   x = 1,312.93